Aerial has 100 thousand to plant only alone horizontal idol extremely aerial (DIPOLE ANTENNA) , simple economy, efficiency tall. Horizontal idol extremely the impedance below aerial standard circumstance is 73 ohm, the graph is a standard establish a

Radio with R 9700 for exemple! The telescopic antenna on machine is all and retractile! Compare fine and long garden with bead shaft, the diameter compares thick little of aerial pull rod slightly only, the printing paper that takes 1/4A4 (do not use

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

Still remember the Zepp Ant in front? If we apply it in the frequency of VHF above, that Mo the after of its Size decrescent we change it very easily into perpendicular erect. It became half perpendicular antenna. Appearance is like J , if pursue 7 (

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