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Phased array Ground Planes antennas for 144 Mhz

Wire antennas requires a special coupling network to properly couple my 50 ohm coax to the antenna's high impedance (5000 ohms)

20 meters through 6 meters, antennas

This end fed type of antenna was marketted in the UK and is a useful system for the portable set-up. Being a half wave, no radials or counterpose wires are needed.

Homebrew balanced-L antenna tuner. Covers 160-10m. Designed specifically for balanced feedlines.

An HB9CV antenna for the 70 cm band in french

This resource presents a detailed analysis of the W6NL 2-element 40-meter **Moxon Yagi** antenna, covering its design, construction, and measured performance characteristics. It outlines key specifications such as a free-space gain of 6 dBi, 11 dBi at 70 feet, and a direct 50-ohm feed. The document highlights the antenna's physical attributes, including 52-foot elements, a 27-foot boom, and a weight of 75 pounds, engineered to withstand 125 mph winds. Modeling was performed using **AO6** and K6STI software, with a focus on the unique functions of the transverse tip elements for Moxon coupling, physical balance, efficient capacitive loading, and reduced wind load. The presentation includes comparative data, showing the Moxon's superior front-to-back (F/B) ratio and wider bandwidth compared to traditional loaded Yagis. Performance graphs illustrate the SWR, gain, and F/B across the entire 40-meter band (7.0-7.3 MHz), comparing measured results against calculated values. Azimuth and elevation patterns demonstrate high F/B, with the antenna's pattern matching that of a full-size 3-element Yagi on a 30-foot boom. It also notes a gain difference of 1.5 dB down relative to a K3LR 4-element Yagi on a 50-foot boom, providing practical benchmarks for performance evaluation.

Dimension and formula for a 4 element QUAD antenna for the 10 meters band

This antenna article is geared towards new Hams and antenna builders looking for a very inexpensive 6 band antenna that can be efficiently fed with 50 ohm coax without a tuner by N4JTE

The original G5RV antenna system consists of a center-fed horizontal 102' wire plus a 34' length of open-wire 525-Ohm feeder. Louis Varney, the antenna system's developer, intended two other features. Learn more at Cebik website

Input the desired resonant frequency and it will calculate lenght in inches feet and meters

Antennas that use a combination of vertical and horizontal polarisation.

If you want an antenna resonoant on the 160 meters band this is a possible solution, but of course, need space.

This is my simple implementation of the ARRL Antenna Book design equations for the axial-mode helical antenna.

W5ALT Indoor Vertical Antenna is a base loaded vertical antenna that can be tuned on almost all HF bands by adjusting a big coil. Operating a ham radio station from an apartment in Maracaibo, Venezuela, the author demonstrates effective communication with over 100 countries using a custom-built indoor vertical antenna. Addressing common misconceptions, the design uses a balanced approach with radials and a base-loaded vertical element made from affordable materials. The antenna fits discreetly indoors, covers 6 to 40 meter bands, and achieves acceptable SWR with an MFJ tuner. Despite limited space and typical apartment challenges, the setup enables reliable DX contacts, confirmed by numerous QSL cards, proving indoor antennas can perform well in constrained environments.

Pictures of the 160 meters dipole antenna at W5JGV

JA7KPI windom antenna page

This antenna project came out very nice. It's a rugged homebrew multi-band trap vertical antenna that works the 10, 15, and 20 meter amateur radio bands. The antenna can be mounted on the ground or on a mast. Mounted on the ground the antenna has a low take off angle for working DX. If mounted on a mast the antenna will acheive both a low angle as well as another radiation lobe that has a much higher take off angle.

Inverted V antennas is a dipole with the center raised on a mast and the endpoints near ground. Calculate dimensions online.

G0KYA slim jim antenna for 10 meters band

A design of a 2 m quagi antenna by TA2IB

A Parasitic Lindenblad Antenna for 70cm by Anthony Monteiro, AA2TX. This is the official 16 pages PDF File published by AMSAT about the 70cm Parasitic Lindenblad Antenna.

A 40-meter reversible _Moxon rectangle_ antenna project details its construction and performance, featuring 51-foot long sides and 7.7-foot turned-in sections. The design incorporates a 16.5-foot boom, with elements spaced 1.1 feet apart, constructed from #14 covered wire. It utilizes two double-pole relays for switching between NE and SW directions, achieving F/B ratios up to 40 dB on CW and 30 dB on SSB, with distinct reflector stub settings for each mode. This antenna replaced a full-size 2-element Yagi, demonstrating comparable forward gain while offering superior F/B ratios and directional flexibility. _EZNEC_ modeling indicates only 0.2 dB less forward gain than the Yagi. The system uses no baluns, relying on half-wave feedlines and switched stubs for impedance matching. The antenna is tree-supported at 45 feet, with its effective radiation height modeled at 80 feet due to local terrain, enhancing its performance over a nearby lake.

8 and 4 elemets yagi beam antenna by N6CA

The Joystick antenna was used many years ago as an all band vertical HF antenna under restricted space situations that would cover from 80 meters thru 10 meters with a tuner and was a great commercial success Some hams even had success with it on 160 meters.

Details the construction of a portable _Moxon_ antenna optimized for the 2-meter band, utilizing readily available materials like 6.5 mm aluminum elements and a 15x15 mm TV boom. The design emphasizes ease of assembly and portability, making it suitable for field operations. Performance specifications derived from MMANA modeling indicate a forward gain of **6.3 dBi** and a front-to-back ratio of **15 dB**. Lateral attenuation is reported at 40 dB, with a minimum SWR of 1.1 at 144.300 MHz, confirming efficient operation within the target frequency segment. The antenna is lightweight at 500 grams, quickly assembled in approximately two hours, and disassembles into a compact 40x15x8 cm package. Direct feeding with RG-58 C/U or KX-15 coaxial cable via a BNC connector simplifies deployment.

Adding an external antenna to the Belkin F5D7050

An attic indoor antenna successfully implemented by N9RET by using two runs of 2-conductor wire

Online calculator for Cantenna special antenna for 802.11 Wi-Fi bands

A Portable Low Frequency Antenna Analyzer, For those of us who like to play with antennas on the ham bands, one of the handiest tools to have around the shack is an "antenna analyzer". These gadgets combine a signal generator and standing-wave ratio (SWR) sensor in a small battery-powered unit.

Active antenna with a frequency response that is flat from 5kHz to over 30MHz

A shortened multiband antenna, about 23m long, for 80m - 10m bands with a low SWR (<1.3) on 80m and 40m, and < 3 till 10m. Bandwith on 80m is 300kHz

The "Largest YU Moxon" document details the design and construction of a substantial multiband Moxon antenna, primarily for 80m, 40m, and 20m operation. It presents specific design parameters derived from NEC-based simulations, including a 4-element 80m Moxon with 37 dB F/B and 7.81 dBi gain on a 47m boom, a 4-element 40m Moxon with a bidirectional pattern, and a 6-element 20m Moxon optimized for specific side lobes. The resource provides precise element lengths and spacing in meters for each band, alongside measured SWR results across the 3.650-3.800 MHz, 7.000-7.100 MHz, and 14.000-14.350 MHz segments. The construction narrative outlines the challenges and solutions encountered by the YU team, including the use of trees for support, the creation of "ugly" air-choke baluns from RG-58 cable wound on plastic bottles for each band, and the meticulous process of attaching wires to a rope boom. It documents the physical dimensions of the vineyard site (47 x 38m) and the azimuth orientation (340 degrees) chosen for the antenna. The document is distinctively useful for its practical insights into large-scale antenna deployment in a field environment, offering real-world SWR measurements and anecdotal performance reports from CQWW contest operations. It includes numerous photographs illustrating the construction process, the team members, and the finished antenna structure, providing visual context to the technical details.

K4TR Manufacture and sell simple dipoles, half square 2 wire phased vertical arrays, end fed zepp antennas, G5RV antennas. 1:1 baluns

Java script antenna calculators for ground planes, half wave verticals, quad antenna, 5/8th wave vertical antenna, dipole and inverted vee antennas

VHF Antenna in a lunchbox. The magnetic loop on two metres band Lloyd Butler VK5BR

Here's an antenna that you can take with you. This is made from cheap flat 300 ohm TV antenna wire.

A new homebrew arial with +- 2.30 m lengt for tuner use only ,6m to 80m made by hans dg7pe

Constructing an HF End-Fed Half-Wave (EFHW) vertical antenna, the resource details the winding of a monoband matching unit, inspired by _AA5TB_, designed to provide a 50 Ohm impedance match without a ground plane or antenna tuner. It specifies the use of a _T200-2_ ferrite core for the transformer, outlining the 13-turn secondary and 2-turn primary winding process with enamelled copper wire. The document also describes the integration of a coax capacitor, whose length is critical for tuning and varies by band, with specific starting lengths provided for 20m, 17m, 15m, 12m, and 10m operation. The practical application section guides the builder through tuning the antenna using an antenna analyzer, emphasizing the iterative process of spacing secondary windings and trimming the coax capacitor to achieve resonance at the desired band frequency. It highlights the antenna's low angle of radiation, beneficial for DX, and claims up to 2 S-points improvement over a _G5RV_ or similar doublet when used as an omnidirectional vertical. A comprehensive shopping list, including specific part numbers from _Rapid Electronics_, is provided, along with advice on selecting fiberglass fishing poles for support and suitable antenna wire.

Pictures of GAP Titan DX vertical antenna assembled by IW5EDI

F6DED page of a 2 element beam W8LK antenna with pictures and dimensions, in french

Notes on bazooka antennas by Katunk: a portable field antenna, sometimes called the double bazooka or a coaxial antenna.

Wound on a 3 foot length of PVC pipe, the long loopstick antenna was an experiment to try to improve AM radio reception without using a long wire or ground.

The Bazooka-antenna was developed by the staff of M.I.T. for radar use. The original Bazooka used coaxial cable for the entire radiating elements.

A small antenna for 2m and 70cm

Hand held portable, 6 meters and satellite antennas

by Harry Lythall SM0VPO

10 to 20 meters band log-periodic antenna project with SWR Plots, boom lenght and element spacing.

A delta loop antenna project for the 40 meters band, include dimensions 80 meters band, with construction details, schematic and tuning instructions

Lincomatic's Homebrew WiFi Antennae, Cantenna, Toothpick Monopole, Patch Antenna, BiQuad, collinear wifi antenna all in one page