Here is how to take that "hot PDF" and adapt it to your specific QTH.
A full-size 20m Yagi requires a 6 m boom and 10 m element span. A 20m Moxon fits on a 4 m boom with a total width of ~7.5 m. It can be mounted just 6–10 m high and still outperform a dipole. Its high F/B reduces local QRM from nearby houses.
The following parameters outline a standard 20-meter (14.200 MHz) wire Moxon build.
The following data is derived from the most frequently downloaded Moxon design tables. These dimensions are for wire antennas (using 14 AWG copper) or aluminum tubing. For a free-space Moxon (center-fed with 50-ohm coax), use these numbers.
Critical Formula (for mental math):
For decades, radio amateurs and HF operators have struggled with a fundamental trade-off: achieving high-performance directivity and gain while dealing with spatial constraints, especially in suburban or portable operating environments. Traditional Yagi-Uda beams offer excellent forward gain but require long booms and multiple elements. Dipoles and verticals are compact but lack directionality and noise rejection. Enter the Moxon rectangle — a two-element antenna that delivers nearly 75% of a 3-element Yagi’s performance in a fraction of the space, making it arguably the best "all-location" HF antenna.
The Moxon rectangle is a brilliant compromise: it offers Yagi-like directivity, exceptional front-to-back ratio, and compact size. For hams operating from small lots, remote summits, or noisy urban environments, the Moxon provides a "best of both worlds" solution. Its simplicity and repeatable performance make it a highly recommended project for any HF experimenter.
Final tip: Search for “Moxon antenna calculator” online — free tools allow you to enter a frequency and get exact wire or tubing dimensions. Many amateur radio handbooks (e.g., ARRL Antenna Book) also include detailed Moxon chapters available as PDF excerpts.
If you’d like, I can help you turn the above into a properly formatted PDF layout (e.g., with columns, figures, and a title page) — just let me know your preferred text editor or if you’d like LaTeX code for a professional typeset.
The seminal work regarding this topic is the book HF Antennas for All Locations Les Moxon (G6XN)
, first published by the Radio Society of Great Britain (RSGB) in 1982. While the book itself covers a wide array of antenna theories for diverse environments, the specific "Moxon Rectangle" design was later refined and popularized by L.B. Cebik (W4RNL)
Below is a structured overview based on the core principles found in Moxon's work and subsequent technical papers. 1. Overview of the Moxon Rectangle
The Moxon antenna is a compact, two-element parasitic beam known for its high directive gain and exceptional front-to-back (F/B) ratio. It is essentially a 2-element Yagi with the ends of the driven and reflector elements bent toward each other. Key Advantages Compact Footprint : Roughly 70% the width of a full-size 2-element Yagi. High F/B Ratio
: Can exceed 30 dB at resonance, effectively blocking interference from the rear. Direct 50-Ohm Match
: Typically does not require complex matching networks when built to spec. Low Radiation Angle
: Offers superior gain and a lower angle for DX (long-distance) communication compared to a standard dipole. 2. Design Considerations for All Locations
Moxon’s philosophy emphasized adapting antenna designs to the specific limitations of the operator’s site. Albury Wodonga Amateur Radio Club Urban/Small Lots
: The bent-element design of the Moxon makes it ideal for locations where horizontal space is restricted. Height Above Ground
: Height is critical for HF (14–30 MHz) to ensure a low radiation angle and clear conductive obstacles like power lines. Ground Conditions
: While many HF antennas rely on ground radials (especially verticals), the horizontal Moxon rectangle is less dependent on soil conductivity for its primary pattern. 0x9900.com 3. Construction and Modeling Resources
For a technical paper or project, you should reference the following tools and guides: Building A 2-Meter Moxon | PDF | Antenna (Radio) - Scribd
The search for "hf antennas for all locations moxon pdf hot" refers to the seminal amateur radio book HF Antennas for All Locations hf antennas for all locations moxon pdf hot
by Les Moxon, G6XN , a former communications engineer and radar expert. The Book: HF Antennas for All Locations
Originally published by the Radio Society of Great Britain (RSGB) in 1982, the book is highly regarded for explaining the "why" behind antenna performance rather than just providing a list of construction plans.
Core Philosophy: Moxon focuses on practical solutions for radio amateurs who lack massive "antenna farms" and must work within the constraints of typical backyards. Key Topics:
Optimizing wire antennas (dipoles, inverted-Vs) for limited spaces.
Reducing the size of beam antennas without significant loss in performance.
Detailed theory on tuned counterpoises and small transmitting loops.
Accessibility: Readers often note it avoids "brain-exploding" complex math, using sketches and charts to illustrate granular concepts. The "Moxon Rectangle" Antenna
While the book covers many designs, Les Moxon is most famous for the Moxon Rectangle, a compact, two-element directional beam. HF Antennas for All Locations - Amazon UK
The Moxon Rectangle: Efficient HF Performance for Every Location
The Moxon antenna, originally detailed by Les Moxon (G6XN) in his seminal book HF Antennas for All Locations, remains a top choice for amateur radio operators facing space constraints or requiring portable setups. Often described as a "bent Yagi," this two-element beam provides a unique balance of directivity and compact footprint. Why the Moxon is "Hot" for HF
The Moxon’s popularity stems from its ability to outperform simple dipoles while being significantly smaller than traditional beams.
Compact Footprint: Folded ends reduce the overall width to approximately 70-75% of a full-size dipole or 2-element Yagi.
Terrific Front-to-Back (F/B) Ratio: It is famous for a deep rear null, often exceeding 30 dB, which "silences" interference from behind the antenna.
Direct 50-Ohm Feed: Unlike many beams, the Moxon typically presents a natural 50-ohm impedance, allowing you to connect coaxial cable directly without complex matching networks.
Broad Bandwidth: Its performance holds up well across an entire ham band, especially when constructed with thicker materials like aluminum tubing. Essential Design Principles
The antenna consists of two rectangular "C" shapes facing each other:
The Moxon Antenna: A Popular Choice for HF Communications
In the world of amateur radio and shortwave communications, the Moxon antenna has gained a reputation for being a simple, yet effective solution for HF (High Frequency) communications. Named after its inventor, Les Moxon (G3XN), this antenna design has been widely used by radio enthusiasts for decades.
A Brief History
Les Moxon, a renowned British engineer and amateur radio operator, developed the Moxon antenna in the 1950s. The design was initially intended for use on the lower HF bands, but its popularity soon spread, and it became a staple for many amateur radio operators.
Design and Characteristics
The Moxon antenna is a type of directional antenna, consisting of two parallel elements, typically made of wire or tubing, which are connected at their ends to form a rectangular shape. The antenna is usually mounted horizontally, with the elements parallel to the ground. This design provides a directional radiation pattern, with a gain of around 3-4 dB over a dipole antenna.
Advantages and Applications
The Moxon antenna offers several advantages that make it a popular choice:
Moxon Antenna for All Locations
While the Moxon antenna is a versatile design, its performance can vary depending on the location and surrounding environment. To optimize performance, it's essential to consider factors such as:
PDF Resources and Hotspots
For those interested in building a Moxon antenna, there are many online resources available, including PDF guides and tutorials. Some popular resources include:
If you're looking for a specific PDF resource on Moxon antennas, you can try searching online archives or websites, such as:
Conclusion
The Moxon antenna remains a popular choice for HF communications, offering a compact, directional, and relatively simple solution for amateur radio operators and shortwave enthusiasts. By understanding the design, characteristics, and applications of the Moxon antenna, you can optimize its performance for your specific location and enjoy reliable HF communications.
Unlocking HF Communications: A Guide to Moxon Antennas for Any Space
Finding the right antenna can be the biggest hurdle in amateur radio, especially when you are dealing with limited space or restrictive homeowner associations (HOAs). One of the most effective solutions is the Moxon Rectangle, a design popularized by Les Moxon, G6XN, in his seminal work, HF Antennas for All Locations .
Whether you're a seasoned DX hunter or a new ham looking for a weekend project, here is why the Moxon is considered a "hot" topic in HF antennas today. What Makes the Moxon Antenna Special?
The Moxon antenna is essentially a two-element Yagi with the ends of the elements folded toward each other. This design provides several distinct advantages:
Compact Footprint: Because the elements are folded, the antenna takes up roughly 30% less space than a full-size dipole.
Exceptional Front-to-Back Ratio: It is famous for its high front-to-back (F/B) ratio, often exceeding 30 dB. This allows you to "null out" interference from the rear while focusing on the station you want to hear.
Easy Matching: Most Moxon designs present a near-perfect 50-ohm load, meaning you typically don't need a lossy matching network or tuner.
Wide Bandwidth: The folded ends act as capacitive loads, which broadens the SWR curve and provides a larger usable frequency range than a standard dipole. Building vs. Buying
You can find several Moxon antenna build guides online that use everything from copper wire and PVC to fiberglass fishing poles. However, if you prefer a ready-to-install solution, there are excellent commercial options available.
A popular choice for 10m and 6m bands. It features a compact 180cm boom and weighs only 6.2kg, making it perfect for row houses or restricted properties. Here is how to take that "hot PDF"
InnovAntenna 18489-15 - InnovAntenna Moxon Directional Antenna $649.99 DX Engineering
These mono-band beams (available for 10m through 20m) are ruggedly built to survive 99 mph winds and can handle up to 7,000 Watts. RFD-MXY3B-45, HF Triband Moxon-Yagi for 20m, 15m and 10m. $994.00 rfdxing.com
For those wanting a single antenna for 20m, 15m, and 10m, this hybrid design offers a high-performance blend of Yagi and Moxon technology. Show more Essential Resources (PDFs and Tools)
To dive deeper into the technical side, you can explore digital archives or use specialized software:
Classic Literature: The original HF Antennas for All Locations PDF by L.A. Moxon is available via the Internet Archive.
Design Tools: Many hams use the MoxGen software by AC6LA to calculate precise dimensions for their specific operating frequency.
Modeling Insights: For advanced users, detailed NEC-2 modeling explores how the Moxon performs at various heights and environments.
The Moxon Rectangle proves that you don't need a massive tower to have a world-class signal. Its combination of compact size and high performance makes it one of the most versatile HF antennas for any location.
DOCUMENT TITLE: HF Antennas for All Locations: The Moxon Rectangle SUBTITLE: A High-Performance, Space-Efficient Solution for Modern Amateur Radio AUTHOR: [Your Name/Call Sign] DATE: October 2023
End of Document
While the book covers many antenna types, it is most famous for popularizing the Moxon Rectangle (a variation of the VK2ABQ antenna). HF Antennas for All Locations by L.A. Moxon (1982-03-03)
The seminal work regarding High Frequency (HF) antennas for diverse environments is HF Antennas for All Locations Les Moxon (G6XN) . This book, published by the Radio Society of Great Britain (RSGB)
, is the definitive guide for radio amateurs dealing with restricted spaces or specific environmental challenges. Amazon.com Summary of the Moxon Rectangle
While Les Moxon’s book covers various designs, he is most famously associated with the Moxon Rectangle , an evolution of the VK2ABQ beam. Design Concept
: It is a two-element parasitic beam with the ends of the driven element and reflector folded toward each other. Key Advantages Reduced Footprint
: It is roughly 70% the width of a full-size two-element Yagi, making it ideal for small yards. Directivity
: Offers high gain (typically around 6 dBi) and an exceptional front-to-back ratio (often exceeding 30 dB). Ease of Feeding
: Designed for a 50-ohm feedpoint impedance, eliminating the need for complex matching networks. Core Principles for Restricted Locations
Moxon's philosophy focuses on maximizing efficiency in "difficult" locations through: Hf Antennas for All Locations - Amazon.com
It sounds like you are looking for a complete technical resource on building and deploying Moxon antennas for HF (specifically for challenging or “all locations” like small lots, apartments, or portable use), and you want it in PDF format — likely because you’ve seen the phrase “Moxon PDF hot” (meaning a popular, highly sought-after document).
While I cannot directly email or host PDF files, I can give you the complete “story” — the practical knowledge, design steps, and deployment strategies — that those sought-after PDFs contain. You can then use this to build your own antenna or locate the exact documents. Final tip: Search for “Moxon antenna calculator” online