Gamma match antenna is an antenna 1/2 additional lambda with the impedance matching more flexible arrangements (var capacitor) by sliding through the gamma match/road. This type of antenna I've ever rafts (th 1994) and used for the FM transmitter with excellent results in setting an appropriate impedance. Measurement of stable 1:1 SWR be quite small. Unfortunately at that time there was no documentation photo
An antenna (or aerial) is a transducer designed to transmit or receive electromagnetic waves. In other words, antennas convert electromagnetic waves into electrical currents and vice versa. They are used with waves in the radio part of the electromagnetic spectrum, that is, radio waves, and are a necessary part of all radio equipment. Antennas are used in systems such as radio and television broadcasting, point-to-point radio communication, wireless LAN, cell phones, radar, and spacecraft communication. Antennas are most commonly employed in air or outer space, but can also be operated under water or even through soil and rock at certain frequencies for short distances.
Details:
- Reflector = 1,03 x Driven
- Driven = 1/2 Lamda
- D1 (direction) = 0,94 x Driven
- D2 (direction) = 0,99 x D1
- D3 (direction) = 0,99 x D2
- D4 (direction) = 0,99 x D3
- .....
- gamma match/road = 0,15 x Driven (PGR)
- gamma road to driven element = 0,25x Driven (JGR)
Examples
If our radio transmitter working at 100 MHz frequency, so
The Lambda ( l )=> Lambda l = C/f ; C = 3 x108 m/s ray velocity, f = frequency Hz
l = (3 x 108)/100x106
= 3 m
Driven = (1/2)x 3 m
= 1,5 m
Reflector = 1,03 x 1,5
= 1,545 m
D1= 0,94xDriven
= 0,9 x 1,5m
= 1,35m
D2= 0,99 xD1
= 0,99 x 1,35m
=1,3365 m
D3 = 0,99x D2
= 0,99 x 1,3365m
= 1,323135 m
D4 = 0,99 x D3
= 1,30990365 m
Gamma road = 0,15 x Driven
= 0,15 x 1,5m
= 0,225 m
Gamma road to driven element = 0,025 x Driven
= 0,025 x 1,5m
= 0,0375 m
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