[not third] as person of V/U wave band gas increases, abstained 8 wood antenna to become popular topic again. Last centuries 20 time, the 8 wood of Japanese northeast university are beautiful second with eaves two people invented Tian Tai 郞 this kind

FM-DV1 occasionally extremely child aerial Frequency limits 87.5-108MHz Side registers mood small loss Whole wave band launchs aerial Perpendicular polarization Stainless steel material is qualitative Thunder of dc ground connection is protected 　

The first kind: Long term aerial. The basis is used actually my and measure, long term the optimal physics length of aerial is the 3/4 length of the wavelengh below some frequency , namely L (rice) =225f (Mhz) . Of course, in its the meeting on times

What is long term aerial How can you just call LONGWIRE ? Draw a line casually? NO! Go up strictly saying that is ANT of RANDOM 　 WIRE 　 only. The name of aerial should depend on here working frequency, if the length as it happens of aerial is half w

Henan saves Zu Qing of Zhao of microwave communication bureau System of route of day make a present of is one of main component that microwave relay corresponds. The move since aerial changes the electromagnetic wave that transmits in line of make a

Have monolayer to cross emissive antenna completely, accurate double deck (monolayer + reflex) , double deck, the 4 different structure type such as the layer, gain is tall, standing wave is small, frequency band is broad. Have design of the waterpro

Want to use radio wave only, possible need uses antenna with assisting electric wave blast off with receive; Aerial depends on working frequency paragraph, by low distinguish to Gao Ke for train in excess specified length wave, long wave, medium wave

Model the characteristic of aerial: J antenna calls Polack aerial again, its characteristic is radiation angle of elevation low and have certain gain, efficiency is 1/4 GP antenna is duple. J antenna the part above is radiation paragraph, the part of