aq_mishu
Full Member level 4
yagi antenna impedance
Guys,
Here is the Antenna specification...
Now It is folded dipole... since the input impedance is a little lower than 48.7, then for a 50 Ohm line, what should i do??? advice me please... also in relfector, can i use a grid reflector instead of one single rod??? i mean will it improve the performance??
Please?
Guys,
Here is the Antenna specification...
Code:
│ ┌─────────────────────────────┤
│ OPERATING FREQUENCY........... {MHz} 435 │ │
│ REFLECTOR LENGTH.............. { m } .345678 │ FORWARD GAIN = 11.34 dBi │
│ FED ELEMENT LENGTH............ { m } .322834 │ │
│ REFLECTOR SPACING............. { m } .097670 │ F to B RATIO = 35.08 dB │
│ #of DIRECTORS 5 Rfl EL DIAM {mm } 5 │ │
│ D 1 SP { m } .078809 D 1 LEN { m } .318990 │ INPUT IMPEDANCE = │
│ D 2 SP { m } .097462 D 2 LEN { m } .291958 │ 48.7 +j 0.0 Ohms │
│ D 3 SP { m } .120921 D 3 LEN { m } .298453 │ │
│ D 4 SP { m } .152478 D 4 LEN { m } .284187 │ ARRAY LENGTH = 0.74 m │
│ D 5 SP { m } .191322 D 5 LEN { m } .264914 │ │
Now It is folded dipole... since the input impedance is a little lower than 48.7, then for a 50 Ohm line, what should i do??? advice me please... also in relfector, can i use a grid reflector instead of one single rod??? i mean will it improve the performance??
Please?