Application Note - PAD-T
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چکیده
.............................................................................................. 3 1 Theoretical Background ..................................................................... 5 1.1 What is an Active Phased Array Antenna? ............................................................... 5 1.1.1 Switched Beam Antenna ............................................................................................... 6 1.1.2 Adaptive Array Antennas ............................................................................................... 7 1.2 Signal Propagation ...................................................................................................... 8 1.3 Antenna Beamforming ................................................................................................ 8 1.3.1 Analog Beamforming ..................................................................................................... 9 1.3.2 Digital Beamforming.....................................................................................................11 1.3.3 Hybrid Beamforming ....................................................................................................11 1.4 Phase-Coherent Signal .............................................................................................12 1.5 Active Phased Array Antenna Measurement Algorithm Test-Bed .......................14 1.5.1 Vertical Sectorization ...................................................................................................14 1.5.2 Antenna / RF Testing System ......................................................................................14 2 Active Phased Array Antenna Measurement .................................. 16 2.1 Transmit Mode Testing for Array Antennas ............................................................16 2.1.1 Transmit Signal Quality Measurement.........................................................................16 2.1.2 Automated Antenna Radiation Pattern Measurement vs Frequency ..........................21 2.2 Receive Mode Testing for Array Antenna ...............................................................33 2.2.1 Amplitude measurement for antenna arrays up to 8 elements ....................................36 2.2.2 Phase measurement for antenna arrays up to 8 elements..........................................37 2.3 Transmit-Receive-Module Testing ...........................................................................38 2.3.1 Manual T/R-Module Testing in Pulsed Mode ..............................................................38 2.3.2 Automated T/R-Module Testing in Pulsed Mode .........................................................41 3 References ........................................................................................ 43 4 Ordering Information ........................................................................ 44
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