Handheld direction finding antenna. Mobile and Fixed-Site Radio Direction Finders RDF Products designs and manufactures professional-quality radio direction finding (RDF) equipment for land-mobile, fixed-site, vehicle tracking and location, shipboard, and airborne radio direction finding and location missions. The Steam Deck is our favorite on-the-go gaming device. Jun 28, 2025 · While the Nintendo Switch 2 and Steam Deck are the obvious choices for best handheld game consoles, we test out everything the portable game device market has to offer. 7 GHz. Area Scan™ techniques make signal location quicker and more accurate. Jul 2, 2025 · Best PC gaming handheld for most people The Steam Deck OLED combines price and performance, starting at $549 on Steam for a portable SteamOS-based handheld with a beautiful screen. This unit was constructed for and donated to the GVARC to aid in assisting members in detecting and proving the location of offending RF interference. N9910X-822 is a handheld log-period antenna designed for Signal Intelligence (SIGINT) and Intelligence, Surveillance and Reconnaissance (ISR), and is ideally suited for a variety of direction finding applications from 600 MHz to 9 GHz. The DF-A0062 direction finding antenna covers a frequency range of 20 MHz to 6 GHz. Alaris DF-A0047 Handheld Direction Finding Antenna (Offered by Tektronix) Tektronix offers the Alaris DF-A0047 direction finding antenna for use in interference hunting applications with our USB spectrum analyzers and SignalVu-PC Map application software. If the signal is too weak, a Yagi is recommended for its directional gain. The full-size elements on all bands give excellent DF sensitivity. 35-39 This little fox hunt sniffer is designed to locate the transmitter down to the last few meters--where other techniques often fail A Doppler Radio-Direction Finder Part 1 Jan 14, 2024 · The 85574A is a portable wideband antenna for RF direction-finding (DF) across a frequency range of 20 MHz up to 8. I found a couple of articles and a video but can't get the cardiod radiation pattern it's supposed to create. Direction finding Radiotriangulation scheme using two direction-finding antennas (A and B) Direction finding antenna near the city of Lucerne, Switzerland Direction finding (DF), radio direction finding (RDF), or radiogoniometry is the use of radio waves to determine the direction to a radio source. RT-400 Mobile Wideband Direction Finder The RT-400 is a portable direction finder, which is designed for search and rescue operations (SAR), law enforcement and localizing of radio interference sources. The RFeye Array is an ultra-wide frequency, multi-mission system for fixed or mobile applications with simultaneous direction finding (DF), spectrum monitoring, and geolocation capability. This MA2700A system is equipped with a GPS receiver and antenna, an electronic compass, and a user-selectable preamplifier. It features a user-selectable preamplifier, integrated compass, and is designed for interference hunting applications when used with Tektronix USB spectrum analyzers. Based on the more portable DFA0095 product, the rugged version features an upgraded electrical, mechanical and environmental design for marine use. Thanks to its robust structure, the HHDF 5110 B is suitable for outdoor use, even under harsh… The 85574A is a portable wideband antenna for RF direction-finding (DF) across a frequency range of 20 MHz up to 8. Direction finding is therefore an indispensable first step in radiodetection, par-ticularly since reading the contents of such National RF provides consulting engineer services, and manufactures direction finding antennas, test equipment, communications receiving equipment and adjuncts, satellite antennas, voice amplification and audio equipment. The RT-400 utilizes wireless Hammerhead Automatic Radio Direction Finder The Hammerhead is the world's most advanced and easiest to use hand held automatic radio direction finder, the result of years of research and development. Yorkie direction finding wideband antenna is an optional, handheld antenna that allows Yorkie to detect and pinpoint cellular activity up to 1/2 mile away outdoors (line of sight) and hundreds of feet away indoors. DF-A0015 implements an 8-element active Adcock array with a centrally located ninth element for omni-directional sensing. This broadband, easy-to-use handheld direction finding antenna system includes everything you need to find the sources of signals. This handheld directional antenna measures electric and magnetic fields in the same environment as the 5110A antenna, but at a higher and wider frequency range of 30MHz - 300MHz. It houses one or two RFeye Nodes, directional antennas, and omnidirectional antennas in a robust radome, designed for hostile environments. The unique Narda antenna handle not only keeps the antennas stable, but with its integrated operating button is also a control instrument for the elementary steps of manual direction finding. With a broadband preamplifier, the system is sensitive. The antenna is Feb 6, 2025 · Hi, I’m new to the SDR space and direction finding in general, but I would like to do some experiments in the mountains where I set up a transmitter and then look for it using a receiver with the right antenna and direction finding software. The Keysight FieldFox handheld RF analyzers include spectrum analyzers, network analyzers, cable and antenna analyzers, and combination analyzers, handling your toughest working environments. Spectrum monitoring and communications intelligence systems worldwide rely on Rohde & Schwarz monitoring receivers, radio direction finders and innovative DF antennas, since these components are highly renowned for their performance and Designed by t-hunters for t-hunters, our custom-made, hand held, fold up, portable radio direction finding antenna is designed for use on 146. It identifies drone flight control and image transmission signals based on spectrum sensing and artificial intelligence technologies. By Bryn Gelbart Published: Aug 1, 2025 Save Article Shop Best Buy for the latest handheld gaming devices and accessories and explore our selection of smartphone gaming controllers, handheld PC gaming and handheld consoles devices. Looks like it might be superior on 2M over loop. This high-powered LPDA is a directional log-periodic dipole array primarily designed for EW applications. Antritsu's handheld InterferenceHunter™ direction finding system. Another reason for the importance of direction finding lies in the fact that spread-spectrum techniques are increas-ingly used for wireless communications. With the best handheld gaming consoles, you can play excellent games anywhere, whether you’re looking for action, puzzle or strategy games. Single compact antenna unit. Jul 10, 2025 · If you want to play great games away from your couch or desk, handheld consoles are finally worth buying. By Bob Leskovec, K8DTS 25884 Highland Rd Cleveland, OH 44143-2722 nevitably, every Amateur Radio com- munity experiences its share ofrepeater jammers. The technology is based on more than 50 years of experience in the development of DF antennas and offers superior sensitivity and accuracy. Efficient, versatile radiomonitoring and fast, precise direction finding for complex signal scenarios. The polarisation is adjustable between vertical and horizontal. The antenna consists of two identical loop antennas arranged in a ‚Äúcrossed-loop configuration, with a large diameter of 1 Power-of-Arrival technique combined with averaging sorts out RF multi-path, frequency drift, shadowing, and reflections, allowing users to find the true signal source despite issues that confuse conventional direction finding techniques. The R&S®MP007 direction finding system is based on the R&S®DDF007 portable direction finder or R&S®PR200 portable monitoring receiver in combination with the R&S®ADDx07 compact DF antennas. Although I’m not a big fan of V/UHF, going over DK7ZB’s website I was impressed by his numerous Yagi antenna design and their good efficiency, and also, myself, eager to do some mechanical construction, I decided to try building this four elements Yagi for 430-440Mhz, to use it this summer in portable operation, mounting hiking etc. This direction finding antenna array covers a frequency range of 1 to 30 MHz. Purchase your Elk 2M/440L5 Dual Band Log Periodic Antenna at GigaParts today! The Keysight FieldFox handheld RF analyzers include spectrum analyzers, network analyzers, cable and antenna analyzers, and combination analyzers, handling your toughest working environments. The HHDF 5110B is a 300MHz handheld directional antenna manufactured by Schwarzbeck, Germany. Aug 1, 2025 · The 5 Best Handheld Gaming Consoles You Can Buy in 2025 Whether you’re playing Final Fantasy I or Final Fantasy XV, carry it with you. The 85574A is a portable wideband antenna for RF direction-finding (DF) across a frequency range of 20 MHz up to 8. These disruptions can stem from co-channel, adjacent channel, or broadband interference. Sep 13, 2025 · Best handheld gaming PC The Steam Deck OLED (buy now) improves on almost everything we took issue with on the original model, letting you play your Steam library wherever you are on a fantastic HDR OLED display. Feb 10, 2015 · By itself, the loop can provide the entire antenna requirement for direction finding provided the signal is strong enough to be received by the untuned loop. This antenna is designed to be used with a suitable portable EMI receiver or spectrum analyzer to locate radio EMI This project was devised some years ago due to the need for 16 identical VHF antennas used for a CADF (Commutated Antenna Direction Finding) system for the 2-meter band. Product Description The Keysight 85574A is a handheld wideband antenna for direction finding and transmitter hunting in the 20 MHz to 8. Has anyone ever built one? I'm referring to the 2M H style dual dipole. Connected to an Anritsu instrument, and with a directional antenna attached, the MA2700A captures location and interfering signal information when the trigger is pressed. The RHOTHETA direction finder system RT-600 Light is designed to receive and locate emergency signals and special application signals on the international distress and application specific frequencies in the VHF / UHF frequency range. Ultimate angular resolution for strong signals is well under 1 Radio Direction Finding Over the years, many techniques have been developed for locating the position of a transmitter. Power on into the Xbox full screen experience optimized for handheld gaming. They incorporate a proven design, electro statically shielded loop sensing element with modern solid state low noise analog and digital technology to allow detection and location of aircraft band signals. A new gener Rohde & Schwarz receivers and direction finders Efficient, versatile radiomonitoring and fast, precise direction finding for complex signal scenarios. The document provides detailed specifications for the Alaris DF-A0047 handheld direction finding antenna, which operates in the frequency range of 20 MHz to 8. A single RF output is provided, with internal switching selecting the appropriate antenna, and The DF-A0048-01 is a compact, stationary and transportable HF direction finding antenna designed for DF systems using the WatsonWatt estimation method, as well as 3-channel correlative DF. The frequency range is based on the used LPDA antenna. Unlike a tuned loop, the Portable Flag is a broadband antenna with unidirectional properties, and it's designed for direction finding from 1. 5 GHz. It can handle a continuous input power of 1000 W and has a gain greater than 5 dBi. The device was used during and after World War II (WWII) for finding and locating enemy (clandestine) radio stations. The directional nature of the antenna allows users to locate their beacon based on the volume of pulses coming from the receiver. in Clearfield (Pennsylvania, USA) for the US Navy. PRODUCT DESCRIPTION: The DF-A0305 is a handheld wideband antenna for direction finding and transmitter hunting in the 4 - 40 GHz band. With an antenna attached, the InterferenceHunter captures a direction and signal level when the user presses The Vector-Finder Types VF-121 and VF 121A are unique in the Vector-finder series of direction finding antennas. The EM-6907 is a passive, handheld antenna for direction finding applications featuring a strong front-to-back ratio with a consistent radiation pattern to improve direction finding capabilities. This offers enhanced, reliable accuracy in real-world applications and field trials over traditional The R&S MP007 is a Direction-Finding System that operates from 20 MHz to 6 GHz. 5 GHz, with an optional extension for 9 kHz to 20 MHz. Here is a simple antenna design that is effective from 3 to 22 MHz. These radio direction finders are carefully designed precision-built units employing true Adcock/Watson-Watt DF Part I – Introduction to Direction Finding What is direction finding? Direction finding refers to the use of specialized instruments, antennas, and methodologies to determine the physical location of a source of RF energy or “targets” Accuracy requirements vary depending on application, but typically on the order of 100 meters or less. Direction finding (DF) techniques enable operators to pinpoint the exact location of the interfering source. Get seamless PC gaming on the go with ROG Xbox Ally X & ROG Xbox Ally gaming handhelds. With a GPS receiver, it knows where it is. It is an integrated device consisting of the R&S DDF007 portable direction finder or the R&S PR200 portable monitoring receiver and the R&S ADDx07 compact DF antennas. The DF system consists of the R&S®DDF007 portable direction finder and a compact DF antenna (R&S®ADD107, R&S®ADD207 or R&S®ADD307). Handheld Drone Detector AAT-HD-5T is a handheld device for detection, identification and direction finding of drones. A slightly better method is to use a directional antenna to (manually) find the direction in which the signal is the strongest (or The 85574A is a portable wideband antenna for RF direction-finding (DF) across a frequency range of 20 MHz up to 8. Operating up to 40 GHz, you are unlikely to ever miss a signal of This data summarizes the technical performance of an antenna used with the FieldFox handheld analyzers for the direction finding. Adcock hand-held direction finding antenna construction Used for fox hunts. Interference hunting involves identifying and locating the source of unwanted radio signals or interference in a communication system. It covers the frequency band from 20 to 520 MHz. It occurred to me that if there was some kind of coffee can shield (or something) that could be placed over the 1/4 A hand-held direction finder that when connected to your HT or FM scanner can locate AM or FM sources over the range or 45 to 470 MHz The NVARC FoxFinder QST April 2001, pp. Spectrum monitoring and communications intelligence systems worldwide rely on Rohde & Schwarz monitoring receivers, radio direction finders and innovative DF antennas, since these components are highly renowned for their performance and Rohde & Schwarz direction finding antennas Innovative direction finding antenna technology with superior performance Rohde & Schwarz DF antennas are decisive for the performance of Rohde & Schwarz direction finders. The battery-operated unit relies on high-precision DF methods. The result is a unique combination of functionality and performance in a system of this size. A single RF output is provided, with internal switching selecting the appropriate antenna, and Handheld Direction Finding Loop Antenna for RFI Location Gary W. Jan 14, 2024 · The 85574A is a portable wideband antenna for RF direction-finding (DF) across a frequency range of 20 MHz up to 8. Tags: Loop, Log Periodic, Dipole, Array. Shop Best Buy for the latest handheld gaming devices and accessories and explore our selection of smartphone gaming controllers, handheld PC gaming and handheld consoles devices. This portable and rugged system allows for precise homing to radio transmitters within the frequency range of 118 to 470 MHz, including emergency frequencies such as 121. The DF-A0047 contains multiple antennas and a user-selectable preamplifier to cover a broad range of interference frequencies and levels The Xeos Technologies DirectionFinder combines an R-1000 Telemetry receiver and a directional Yagi antenna into a single handheld unit for locating VHF emitting beacons, such as the XMB. Tempers flare. From portable- and semi-portable direction finders over systems optimized for air traffic control to large HF direction finding installations, we can provide not only RDF sensors but also complete RDF Solutions. When connected to Narda’s powerful real-time receiver, the SignalShark, the device can precisely and reliably localize signals . 5 ELT location? Ran into this last week, finally got it buy process of elimination, but it took time and some work. With an antenna attached, the InterferenceHunter captures a direction and signal level when the user presses The DF-A0047 from Alaris Antennas is a Antenna with Frequency 20 MHz to 8. Download the Datasheet, Request a Quote and get pricing for R&S®ADD557SR. 7 m in length which allows compact The DF-A0088 is a wideband DF antenna suitable for rugged applications. 8 to 30 MHz as long as an appropriate preamp is used. This data summarizes the technical performance of an antenna used with the FieldFox handheld analyzers for the direction finding. 5, 243, and 406 MHz (COSPAS-SARSAT). Each of direction finders is a multi-functional tool, which provides not only for direction finding, but also for panoramic high-speed scan over entire frequency range or separated sub-ranges, automated monitoring of signal at separated frequencies, measuring of signal parameters, signal recording and technical analysis of radio signals. The most simple but nevertheless effective method, is to use a receiver or a field strength meter in combination with an adjustable attenuator. I A crossed-loop/monopole direction finding antenna for use with Watson Watt method, with a large diameter of 2 m to achieve a high sensitivity. A separate, but fully integrated active monitoring antenna gives high sensitivity omni-directional coverage on the same axis as the DF antenna, without interfering with the DF array. The system consists of an Antenna Unit (AU), which is designed light and robust for typical use on unmanned aircraft. More details for DF-A0047 can be seen below. High bandwidth with excellent consistency. IP56 rated Alaris handheld direction finding antenna for use in interference hunting applications with Tektronix USB spectrum analysers and SignalVu-PC Map application software. Oct 22, 2014 · This is a handheld wideband antenna for direction finding and transmitter hunting. We've spent hundreds of hours testing and reviewing to find the five best handheld gaming PCs in 2025. This means that the spectral components can only be allocated to a spe-cific emitter if the direction is known. 5 GHz, Gain 6 dBi, Operating Temperature -30 to 55 Degree C, Storage Temperature -30 to 71 Degree C. It is great fun for young and old alike - an opportunity for personal challenge in the great outdoors! The R&S®MP007 direction finding (DF) system combines the R&S®PR200 portable direction finder upgrade kit with R&S®ADDx07 compact DF antennas. All Elk 2M/440L5 models come with a handle for handheld operation, making this antenna perfectly set up for satellite, direction finding, and very portable operations. It's even useful for direction finding down in the AM broadcast band. The loops make use of patented cross-polarisation cancelling technology that eliminates disturbances due to crosspolarisation from on-horizon sources. With the electronic compass it knows where it is aimed. Other handheld PCs are more powerful, but Steam OS is a more elegant OS than Windows, and that’s why the Steam Deck reigns supreme. The R&S®DDF007 is used in conjunction with compact DF antennas, making it ideal for all applications that call for a powerful yet handy direction finder. May 30, 2011 · Anybody have any experience in using a handheld VHF for 121. Included with the antenna is an integrated quad-pod, a carry bag and guy ropes. The antenna has a redesigned loop array for good DF performance at low frequencies where the phase size of the array is small and three pentagonal dipole-based arrays for the Feb 15, 2022 · R&S®ADD557SR - Direction Finding Antenna from Rohde & Schwarz. By Bryn Gelbart Published: Aug 1, 2025 Save Article Lightweight, compact and rugged, the DF-500 direction finder is a software-defined radio specifically designed for compatibility with all search and rescue (SAR) mission platform requirements. Aug 19, 2025 · Handheld gaming systems are having a moment. Patent Pending tri-antenna technology provides precise directional indicator. The DF Loop (direction finder loop) is an offspring of the ordinary loop antenna designed to be portable for use in locating RFI sources. It combines several antennas in a neat housing, and some integrated electronics to make it more effective when used in conjunction with signal analyzers. In this case Mar 20, 2024 · I have some Powerline RFI noise in my neighborhood and thought this would be a good project to make a loop that can be directional to help me in locating whe Handheld Direction Finding Loop Antenna for RFI Location Gary W. High sensitivity receiver. Johnson, NA6O May, 2019 A good way to locate radio-frequency interference (RFI) in the HF bands is with a small direction finding antenna and a portable radio. Oct 19, 2024 · ARDF joins orienteering skills like the proper use of topographic maps, compass skills, and locational awareness, with radio direction finding skills using hand-held portable receivers and antennas. The MA2700A allows easy-to-use handheld direction finding and includes an internal preamplifier, a GPS receiver, and an electronic compass. The SignalShark ADFA 2 has a higher frequency range from 10 MHz to 8 GHz as compared to the ADFA 1 which operates from 200 MHz to 2. Frequency range 110 to 410 MHz. Portable radio direction finder DAG-1 1 was a portable radio direction finder, manufactured from late 1942 onwards by Airplane & Marine Instruments, Inc. • Direction finding refers to the use of specialized instruments, antennas, and methodologies to determine the physical location of a source of RF energy or “targets” Product Description The Keysight 85574A is a handheld wideband antenna for direction finding and transmitter hunting in the 20 MHz to 8. The antenna can be broken down into pieces smaller than 2. The R&S®DDF007 portable direction finder has an integrated, fast wideband receiver that covers a very wide frequency range. The Handheld Direction Finder HHDF 5110 B was designed to locate radio transmitters in conjunction with a suitable portable receiver or spectrum analyser. 5 GHz band. I’d like this to be fairly portable, ideally something that can be carried in my hands, but I can put it in a pack or on a little sled if needed. Jan 15, 2020 · Narda Safety Test Solutions (STS), an RF measurement specialist, has introduced its second automatic direction-finding antenna. Sep 3, 2025 · A turnstile antenna for 2-meter ARDF Antenna design for use with hidden transmitters on international-rules ARDF events Handi-Tenna portable satellite antenna Here is a high-performance hand-held beam antenna that is easy to build and guaranteed to improve your downlink from the LEO satellites over ANY rubber duck or mobile whip Hidden Transmitter Hunting Lots of information of hidding Military Aviation Search & Rescue Fixed Direction Finding 10-246-1 | 406-28 | 407-3 Key Features Multi-beacon DF. The RT-400 is a state-of-the-art Radio Direction Finder designed for search and rescue operations, law enforcement, and pinpointing radio interference sources. While people have been gaming on the go since the halcyon days of the Game Boy, recent years have brought an avalanche of devices that let you play all Apr 23, 2025 · The best handheld gaming PCs are my favorite way to game. Build the HANDI-Finder! This hand-held direction finder is great for "fox hunting"! Simply connect it to the antenna input of your H-T or FM scanner and you can locate AM or FM sources over the range of 45 to 470 MHz. 565 MHz. Contact BVS sales for more details and specifications. A single RF output is provided, with internal switching selecting the appropriate antenna, and The R200 is a lightweight, cost-effective, and user-friendly VHF direction finding antenna designed to operate within the frequency range of 20MHz to 200MHz Product Highlights: Accurate radiation directionality: Determines direction by pointing towards the maximum signal amplitude. For improved performance at low frequencies, the DF-A0076 can be installed instead. ahfapol mcwfo ojexo boom jxankn ildm crqacly mual zdruj hqfij