can a wavelength/2 antenna can catch other wavelengths?

Question

as a antenna configured for 65 mhz can catch 75 mhz frequency?

Answer 1

Yes, a half wavelength antenna designed for 65 MHz will work very well at 75 MHz. There's only a 15% difference in frequency. The antenna pattern will be slightly different at 75 MHz compared to 65 MHz, and the antenna impedance will also be a bit different at 75 MHz than at 65 MHz. It's somewhat dependent on the ratio of length of antenna to diameter of the wire from which it is made, with thicker wire generally giving wider bandwidth. But it will work pretty well, regardless. The best way to make an antenna to operate on both 65 and 75 MHz is to design it to be a half wavelength at the geometric mean frequency ( = square root of 65 times 75 ) or 69.8 MHz.

Answer 2

Yes.

Example:
The simple di-pole antenna embedded in a car windshield, designed to capture the band from 88 MHz to 108 MHz is a fixed length -- which is much longer than the wavelength of the lowest frequency (88 MHz). The necessary (wave)length is about 0.3 meters, but the actual length is almost 2 meters. This antenna functions well to pick up all FM stations (and AM stations, too, with a much *longer* wavelength).

Answer 3

Yes, it will work with varying degrees of efficiency at multiples of that wavelength. eg 1/4 wavelength, 1/8 wavelength etc. So an antenna designed for 1GHz will also work to some degree at 2GHz.
If f you are asking specifically if your 65MHz antenna will work at 75MHz, that will depend on the bandwidth (range of frequencies it will work at) of the antenna. Antenna design is all about trade-offs. The higher the gain the lower the bandwidth, etc...

Answer 4

It will catch other wavelengths (within a certain bandwidth depending on the antenna construction). However, the further you get from its resonant frequency the higher the noise to signal ratio will be.

Answer 5

U will get the gain at the cut frequency and u may be able to see the other signal but it could quite a bit down.

Answer 6

1)yes antenna will detect all the wavelength and transfers it to detector circuit.
2)detector circuit will select only required signal and transfers it to amplifier or something for further processing

Answer 7

It will certainly catch harmonics. It won't be efficient at capturing non-resonant wavelengths.