Ham Radio Antenna Resources
A curated collection of the most useful free software, online tools, reference texts, and communities for ham radio antenna builders and experimenters. Every resource listed here has been evaluated for practical usefulness — this is not an exhaustive directory but a focused selection of the tools that actually get used in the field and on the workbench.
Essential HF/VHF Antenna Lengths — at a glance
MMANA-GAL
The most accessible full NEC2 antenna modeller for amateur radio. MININEC and NEC2 engines, graphical wire entry, pattern plots, frequency sweep, and optimiser. The standard starting point for HF wire antenna design. Handles dipoles, Yagis, loops, verticals, and phased arrays with ease. The MMANA-GAL guide on this site covers the full workflow.
HFWire antennasBeginner-friendly4NEC2
Full NEC2 and NEC4 modelling engine with Sommerfeld-Norton ground, advanced optimiser, stepped-diameter correction, and extensive output options. More powerful than MMANA-GAL but steeper learning curve. The preferred tool for serious HF antenna design and verification. The 4NEC2 guide covers installation and workflow.
HF/VHFAdvancedNEC2/NEC4YO Yagi Optimizer (K6STI)
Purpose-built Yagi optimisation tool using a genetic algorithm. Specify performance targets and boom length; YO finds the element dimensions. The fastest path from a Yagi specification to a practical element table. Export to NEC2 for verification in MMANA or 4NEC2. See the YO guide.
Yagi designHF/VHFOptimisationOpenEMS
FDTD full-wave electromagnetic solver for complex 3D antenna structures — patch antennas, dielectric substrates, coaxial connectors. Far more powerful than NEC2 for VHF/UHF antennas with dielectric components. Requires scripting (Python or MATLAB/Octave). See the OpenEMS guide.
VHF/UHF/MicrowaveFDTDAdvancedLinSmith
Interactive Smith chart tool for impedance matching design. Plot impedance trajectories, design L-networks, gamma matches, and stub tuners. Imports NanoVNA .s1p data for measured-data matching design. See the LinSmith guide.
Impedance matchingSmith chartAll bandsAutoEZ
Excel-based parametric front-end for EZNEC. Variable-driven antenna geometry, automated frequency sweeps, multi-antenna comparison, and Solver-driven optimisation. The most powerful tool for systematic antenna design exploration if you use EZNEC. See the AutoEZ guide.
Parametric designSweepsRequires EZNECHFTA (HF Terrain Assessment)
FDTD terrain analysis tool that models how the slope and contour of your specific hilltop or ground affects the take-off angle and low-angle gain of any HF antenna. Uses SRTM terrain data. One of the most important tools for DX station optimisation. See the HFTA guide.
HF terrainDX planningTake-off angleNanoVNA-Saver
PC companion software for the NanoVNA vector network analyser. Sweep control, Smith chart display, S-parameter export (.s1p), TDR cable fault location, and calibration management. Essential companion to any NanoVNA for antenna measurement work. See the NanoVNA guide.
VNA softwareMeasurementTDRGpredict
Satellite tracking and pass prediction with real-time world map display, rotor control interface, and CAT radio control for automatic Doppler correction. The standard free tool for amateur satellite operation. See the satellite guide.
Satellite trackingDoppler correctionPass predictionWSJT-X
WSJT-X implements FT8, FT4, JT65, JT9, WSPR, MSK144, and other weak-signal digital modes. Essential for WSPR-based antenna testing (running antenna A vs B over hours to collect SNR comparison data) and for 2 m meteor scatter. See the WSJT-X and WSPR guide.
WSPR antenna testingDigital modesWeak signalReverse Beacon Network — reversebeacon.net
Global network of CW skimmer stations that spots your CW transmissions in real time and reports SNR from dozens of worldwide receiving stations. The most powerful free antenna comparison tool available — transmit CW, compare SNR from the same spotters with antenna A and B. Full guide at RBN antenna testing guide.
Antenna testingCWReal-world dataPSKReporter — pskreporter.info
The FT8/digital equivalent of the RBN. Every FT8 transmission is automatically spotted by receiving stations and posted to PSKReporter. Real-time reception map updated every 15 seconds. Switch antennas during a session and compare reception reports for immediate qualitative antenna comparison.
Antenna testingFT8/digitalReal-timeWSPRnet — wsprnet.org
WSPR reception database. Download spot data for your callsign as CSV, filter by time window, and compare median SNR from identical reporting stations during antenna A vs. antenna B WSPR sessions. The definitive tool for statistically rigorous portable antenna comparison. See WSPR antenna testing guide.
WSPR dataAntenna comparisonStatistical analysisDXplorer — dxplorer.net
Advanced WSPR data analysis and visualisation tool. Plots WSPR SNR as a function of azimuth, producing empirical azimuth radiation patterns from real propagation data. Time-of-day analysis, band comparison, and directional pattern plots. Excellent for visualising Yagi beam pattern performance from WSPR data.
WSPR analysisPattern visualisationDX planningAC6LA Online Tools — ac6la.com
Dan Maguire AC6LA's collection of online antenna tools including transmission line loss calculators, matching network designers, and the AutoEZ software. The coax loss calculator is particularly useful: enter cable type, length, frequency, and SWR to get accurate insertion loss including the SWR adder effect.
Transmission lineMatching networksOnline toolsCelestrak TLE Data — celestrak.org
The primary source of up-to-date Two-Line Element (TLE) orbital data for all satellites including amateur OSCAR satellites. Gpredict, SatPC32, and all other tracking software can download TLEs directly from Celestrak. Update your TLEs before every satellite operating session — orbital data degrades within days.
Satellite trackingTLE dataAMSATARRL Antenna Book
The definitive reference for amateur radio antenna design and construction. Covers theory from first principles through advanced topics including HFTA terrain analysis, phased arrays, small transmitting loops, log periodic antennas, and HF mobile antennas. The current edition includes a CD/download with antenna modelling files and software. Every serious antenna experimenter owns a copy.
HFVHFTheory + practiceON4UN's Low-Band DXing
The authoritative reference for 160 m, 80 m, and 40 m DX operation and antenna design. Covers beverage antennas, receive arrays, phased verticals, propagation analysis, and operating strategy for the low bands in extraordinary depth. Essential reading for any operator focused on low-band DX. The receive antenna chapters are unmatched in the amateur literature.
160m/80m/40mDXPhased arraysYagi Antenna Design (James Lawson W2PV)
The classic treatment of Yagi antenna optimisation theory. Covers mutual coupling, the design of high-performance multi-element Yagis, stacking, and the relationship between element dimensions and performance parameters. Dense and mathematical but the foundational text for anyone who wants to understand why Yagi designs work as they do rather than just following published dimensions.
Yagi designTheoryAdvancedReflections (M. Walter Maxwell W2DU)
A thorough treatment of transmission line theory, SWR, and feedline loss in amateur radio systems — correcting many persistent misconceptions about SWR and its effects on feedline loss and transmitter output. Essential reading for anyone who wants to understand the real relationship between SWR and station efficiency rather than the oversimplified "high SWR is always bad" view.
Transmission linesSWR theoryFeedlineHF Antennas for All Locations (Les Moxon G6XN)
G6XN's practical guide to HF antenna design for operators with limited space or supports — the book in which the Moxon rectangle was first described and explained. Filled with practical designs for constrained sites, clear explanations of antenna theory without excessive mathematics, and an emphasis on what actually matters for real-world performance.
HFRestricted spaceMoxonSmall Antennas for Small Spaces (Steve Ford WB8IMY)
A practical guide to effective antenna operation from apartments, small gardens, and HOA-restricted properties. Covers magnetic loops, end-fed wires, stealth antennas, attic installations, and indoor antennas with realistic performance expectations. A useful companion to the more theoretical ARRL Antenna Book for operators facing practical installation constraints.
Restricted spaceStealthPracticaleHam.net Antenna Forums
The most active English-language forum for antenna discussion, equipment reviews, and construction questions. The antenna reviews database (eham.net/reviews) has user-submitted reviews of virtually every commercial antenna — useful for comparing real-world performance reports before purchasing. Search the forum archives before posting — most common antenna questions have been answered in detail.
ForumReviewsGeneral HF/VHFQRZ.com Forums
Large active community with dedicated antenna, technical, and construction forums. The QRZ logbook and callsign lookup are also valuable resources. The antenna forums have particularly active discussion of stealth and restricted-space installations — useful for operators who cannot erect conventional antennas.
ForumCallsign lookupStealth antennasRSGB (Radio Society of Great Britain)
The RSGB publishes RadCom magazine (available digitally to members) with regular antenna construction articles, technical notes, and practical guides. The RSGB Technical Library contains decades of archive material. RSGB also maintains active technical committees and publishes the Radio Communication Handbook — the UK equivalent of the ARRL Handbook.
UK focusMagazineTechnical libraryAMSAT — Amateur Satellite Corporation
The primary organisation for amateur satellite operation. AMSAT maintains the satellite status database (amsat.org/status), publishes operating guides and TLE data, and runs the AMSAT-BB mailing list — the most active discussion forum for satellite operating questions. Membership supports the development and launch of future amateur satellites.
SatelliteStatus databaseOSCAR awardsSOTA (Summits on the Air)
The international portable operating programme for summit activations. SOTAwatch3 lists upcoming activations and recent logs. The SOTA Reflector (reflector.sota.org.uk) is the active discussion forum for SOTA technical questions including antenna construction, radio selection, and operating technique. Essential for anyone starting out with portable VHF or HF operation from hilltops.
Portable operationSummit activationsQRP