Written to bridge the gap between basic theory and graduate-level engineering texts, the second edition of Antenna Physics: An Introduction includes new material to help you better understand the complexities of antenna theory.
World-recognized antenna technology authority Robert J. Zavrel, Jr., W7SX, is your guide to grasping a deeper understanding of how antenna systems function. In this book, he clearly communicates the theory and the mathematics that form the foundations upon which all antenna designs depend.
Antenna Physics: An Introduction, 2nd ed, is available from the ARRL Store or your ARRL Dealer. (ARRL Item no. 1359, ISBN: 978-1-62595-135-9, $34.95 retail, special ARRL Member Price $29.95). Call 860-594-0355 or, toll-free in the US, 888-277-5289. It will also be available for the Amazon Kindle.
Antenna
Installing Wire Antennas in Trees
Installing Wire Antennas in trees Read Full Article: Read more
Multiband Delta Antenna – M0PLK
Multiband Delta Antenna Closed loop antennas are always less sensitive to noise than open driven element antennas (e.g. vertical or dipole). T... Read more
Full Size Mega Loop Antenna 6 to 160m
“Nearly two years ago, we decided that we needed a better antenna for all band operation to replace our traditional use of wire dipoles.... Read more
10-40 Meter Coaxial Loop Rated IP54 for Base, Mobile, & Tactical
The built-in SWR indicator makes the Alpha Loop so very easy to tune! Now you can suddenly hear everyone, and they can hear you! This is an antenna th... Read more
Build your own Hexagonal Beam
The hexagonal beam (or known by many as the hex beam) has become a wildly popular antenna. It is a directional antenna that provides great performance... Read more
Review
RF transistor handles 1.5kW 1.8 to 500 MHz
NXP’s MRF1K50H is a 1,500W LDMOS transistor, following on from the 1,250W MRFE6VP61K25H. This high ruggedness device, MRF1K50H, is designed for use in... Read more
ZUMSpot RPi Hotspot Review
HRO has an exclusive new ZUMSpot with an LCD screen The ZUMspot RPi is an advanced radio module board. Paired with a Raspberry Pi and the MMDVM soft... Read more
NanoVNA-H4 Network Analyzer, $86 Antenna Analyzer Review/Demo
Today we are checking out the NanoVNA-H4 analyzer. This little gem does a lot more than just SWR, so check out this video and other videos on YouTube... Read more
Set up an entire HF station for under $1000?
“A viewer asks: I want a home base station trans/receiver so I can listen till I am licensed. Need an antenna too. But all for under $1000 if po... Read more
Equipment
Tech-out of the Xiegu XPA125B Auto Tuner + Amplifier
Today we take a look at the Xiegu XPA125B QRP Amplifier and Auto Tuner hooked up to the Icom IC-705. This amp will work with a variety of QRP rigs inc... Read more
1:1 Current balun Dual core 1500 watts RTTY, 5KW ICAS
1:1 dual core current balun Constructed using dual 240/31 cores. Stainless steel hardware. 1-61MHZ With dual cores you get great frequency range, equ... Read more
ICOM IC-DPR30
ICOM IC-DPR30 Smallest and lightest ever ※ 1 , built-in antenna, Bluetooth ® support. New release of the transceiver IC-DPR30 that can be used to styl... Read more
Amplifier 1.2 kW Spert 1200 – 1.8 to 50 MHz
Output power of 1200 W CW / SSB in the field KF, 700W in the band of 50 MHz Power 50V 35A efficiency of 73-75% frequency range 1.8 to 50 MHz switching... Read more
Icom releases the ID-52A/E Amateur Handheld Transceiver with Color Display and Bluetooth® Communication
Icom Incorporated (Headquarters: Hirano, Osaka, Japan/President: Masataka Harima) releases the ID-52A/E*, VHF/UHF dual band digital transceiver that s... Read more
News
Mysterious Radio Signal Discovered in Milky Way Center | What Is It!?
Ziteng (Andy) Wang is a PhD student at the University of Sydney. He recently discovered an unusual radio signal coming from the direction of the Milky... Read more
TRI BAND TRANSCEIVER – RS-UV3A
The HobbyPCB RS-UV3A radio module is a 144/220/450 MHz FM transceiver board. The RS-UV3A is a low cost transceiver solution for Packet Radio, repeater... Read more
ARRL Continues Its Efforts to Preserve Amateur Radio Secondary Use of the 3 GHz Band
ARRL President Rick Roderick, K5UR, in a written statement on the newly filed H.R.5378 before the US House Commerce Communications and Technology Subc... Read more
![Why Ham Radio [ ARRL Video ]](https://qrznow.com/wp-content/uploads/2021/10/hq720-1-265x168.jpg)
Why Ham Radio [ ARRL Video ]
Josh Nass, KI6NAZ, of @Ham Radio Crash Course talks about what ham radio is, and answers the question…. “Why Ham Radio?” Read more
High Speed Telegraphy 2021 in Montenegro
September 10-14, 2021, the 17th World Championship High Speed Telegraphy was held in Montenegro. The event was organized by MARP (Montenegrin Amateur... Read more
