qrp-gaijin
2022年3月19日土曜日
Losses in a helically-wound small transmitting loop antenna
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In 2014, K4HKX published measurements showing that a helically-wound small transmitting loop (using 3-inch wide by 0.012-inch thick copper s...
2022年2月20日日曜日
Fixed image problems with recent posts
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Due to some changes in the blogger platform, some images in my recent posts may have been broken. I re-uploaded the images, and they should ...
2022年2月19日土曜日
A 1-meter-diameter small transmitting loop for 7 MHz: part 8
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The effect of thin, crumpled, separate copper strips on antenna gain A small loop antenna with the following parameters was simulated in 4ne...
A 1-meter-diameter small transmitting loop for 7 MHz: part 7
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RF resistance of thin and crumpled copper tape One feasible approach for constructing a 10-cm-diameter conducting copper tube is to use com...
2022年2月18日金曜日
A 1-meter-diameter small transmitting loop for 7 MHz: part 6
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Evaluating conductor loss in the total antenna context This post provides more context to the conductor loss values computed in part 4 of th...
2022年2月13日日曜日
A 1-meter-diameter small transmitting loop for 7 MHz: part 5
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Moving to a multi-turn loop I have been hesitant to implement a multi-turn transmitting loop due to the reported measurements and experience...
2022年2月11日金曜日
A 1-meter-diameter small transmitting loop for 7 MHz: part 4
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Abstract This post describes the results of Finite-Element-Method simulations (using the software package FEMM) of the RF resistance at 7 MH...
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