4 3 Yagi Antenna
Found 4 free book(s)This is an archive page that is no longer being updated ...
www.ojp.govThis antenna has moderately high gain, but its most important pattern feature is that the forward (main beam) gain is much higher than the gain in the opposite direction. This is called the front-to-back ratio and is evident in the pattern shown in figure 14. 5.4 Yagi Another antenna design that uses passive elements is the Yagi antenna. This ...
Yagi antenna design - NIST
nvlpubs.nist.govCONTENTS 1. INTRODUCTION 2.METHODOFMEASUREMENT 3.RESULTS 3.1EffectofReflectorSpacingonMeasuredGain 3.2EffectofDifferentEqualLengthDirectorsand forDifferentYagiLengths ...
Building an End Fed Antenna
www.ogdenarc.orgcarefully cut to 85’ with over 65’ of feed line and finally my antenna at 203’ feet, however my feedline is only 90’ long. I took careful measurement of my antenna and here are the results: Freq. SWR @ Radio 1.9 5.2:1 3.574 3.3:1 7.074 1.5:1 10.136 1.3:1 …
The “Hairpin” Match - ehpes
ehpes.combalanced 200 ohm antenna impedance that is further transformed with a 4:1 λ/2 coaxial “step up balun.” This provides a final 50 ohm unbalanced antenna impedance that is a good match to a 50 ohm (unbalanced) coaxial cable. 7 At N6MW a 160 meter vertical of 17.5 m height with conducting guy wires attached at