Aircraft VHF antenna 135-175 MHz

[guytoub]

hello,
i want to design an VHF antenna working beetween 135-175MHz . which sort an antenna i can made? i tried a simple monopole on a finite groung plane but i need to do an wideband impedence matching.

if anyone have papers about that , please .

regards

 

[BradtheRad]

For a while I borrowed a multi-band radio. Commercial FM, police, aircraft. Had a plain rod antenna. The action was local (within 30 miles) and usually free of static. The key is to dial slowly and listen on a frequency for an indeterminate time until someone transmits because a lot of the time a frequency is silent.

I've seen projects that start with an FM receiver, then make a few adjustments to bring in the faster frequencies so you can hear police and aircraft. I suppose the antenna can be a proportionally smaller than the dipole we usually made from 300Ω twin-lead cable for commercial FM.