Fig 1.
Topological diagram of 20W RF transmit front-end PA for Star Ku-Band.
Table 1.
Main technical indices of its system design.
Fig 2.
NF curve.
Fig 3.
StabFact curve.
Fig 4.
Gain curve.
Table 2.
Performance comparison of low-noise amplifiers.
Fig 5.
Block diagram of single-channel preamplifier module.
Fig 6.
Phase-shift performance simulation curve.
Fig 7.
Schematic diagram of the preamplifier module.
Fig 8.
Block diagram of drive-amplification module.
Fig 9.
Drive-amplifier module schematic.
Fig 10.
Output-performance curve of the driver-amplifier module.
(a) Frequency-output power graph (b) Input power-output power/gain/Id graph.
Fig 11.
Block diagram of the final-stage amplification module.
Fig 12.
Schematic diagram of the final-stage amplifier module.
Fig 13.
Schematic diagram of microstrip-translational waveguide transition.
Fig 14.
Simulation model of microstrip-to-waveguide transition.
Fig 15.
Simulation curve of microstrip-to-waveguide transition.
Fig 16.
Performance test chart of the final-stage amplification module.
(a) Frequency-gain test curve (b) Frequency-SWR test curve.
Fig 17.
Power-supply unit: Schematic block diagram.
Fig 18.
Monitoring-module control schematic.
Fig 19.
Diagram of the 20W RF transmit front-end PA for star Ku-Band.
(a) Forced air-cooling design diagram (b) Grid-type heat-sink design diagram (c) PA internal layout diagram.
Fig 20.
Experimental system test diagram.
Fig 21.
PA input-output relationship diagram.
Fig 22.
Output-power test-results graph.
(a) Power-output test chart (b) Output-power flatness in frequency band (c) P1dB output power at 13.75GHz and 14GHz frequency points (d) P1dB output power at 14.25GHz and 14.5GHz frequency points.
Fig 23.
Graph of environmental test results.
(a) Input–temperature–output power (b) Frequency–temperature–output power (c) Output-power flatness at the limit temperature (d) Output-power flatness in the full frequency band.
Fig 24.
Third-order cross-tuning simulation curve of the final-stage amplifier module.
Fig 25.
Third-order intermodulation test results.
(a) Third-order intermodulation at 13.75GHz, 14 GHz (b) Third-order intermodulation at 14.25GHz, 14.5GHz.
Fig 26.
Power-detector simulation diagram.
Fig 27.
Spurious suppression test-result graph.
(a) 13.5GHz spurious suppression (b) 14GHz spurious suppression (c) 14.25GHz spurious suppression (d) 14.5GHz spurious suppression.
Fig 28.
Harmonic suppression test-result graph.
(a) 13.5GHz harmonic suppression (b) 14GHz harmonic suppression (c) 14.25GHz harmonic suppression (d) 14.5GHz harmonic suppression.
Fig 29.
Attenuation simulation graph.
Fig 30.
Attenuation performance test-results graph.
(a)Attenuation of 0.5dB (b)Attenuation of 1dB (c)Attenuation of 2dB (d)Attenuation of 4dB (e)Attenuation of 8dB (f)Attenuation of 16dB.
Fig 31.
Gain-test curve graph.
Table 3.
Performance comparison of Ku-band PAs.