Active Member
|
[China]
Address: No.153 Longpan Road, Xuanwu district, Nanjing City, China
Contact name:Coase Mao
Please input your companyname! |
|
3. High setup test field
As shown in Fig. 1.2, on flat ground, install the receiving/transmitting antenna on top of the cement tower or adjacent high building, make the first zero point of the transmitting antenna pattern point to the ground reflection point, thus the ground reflection is reduced. The distance between two antennas is determined by the far-field condition. The high test field is suitable for parameter testing of the antennas with larger physical dimension. The measuremeant below may reduce or eliminate the reflection of the surrounding environment.Select the rational transmitting antenna directivity factor to minimum the side-lobe level.
Clear visual obstructions between two antennas.
Take measures to change the reflection wave direction or absorb the reflected energy for the obstructions in the field and the surface reflected wave.
Adopt signal processing technology, e.g., frequency modulation or short pulse wave emission.
