A Design Procedure for High-Efficiency and Compact-Size 5–10-W MMIC Power Amplifiers in GaAs pHEMT Technology

2013 ◽  
Vol 61 (8) ◽  
pp. 2922-2933 ◽  
Author(s):  
Gholamreza Nikandish ◽  
Ali Medi
Keyword(s):  
Power Amplifiers ◽  
High Efficiency ◽  
Design Procedure ◽  
Compact Size

Smart DRA for beam width and orientation control

Frequenz ◽  
2020 ◽  
Vol 74 (11-12) ◽  
pp. 383-392
Author(s):  
Rajveer S. Yaduvanshi ◽  
Richa Gupta ◽  
Saurabh Katiyar
Keyword(s):  
Radiation Pattern ◽  
High Efficiency ◽  
Beam Width ◽  
Beam Control ◽  
Design Flexibility ◽  
Compact Size ◽  
Close Proximity ◽  
Cellular Communication Network ◽  
Arc Shape ◽  
Broadside Radiation

AbstractSmartdielectric resonator antenna (DRA) having beam control mechanism is anew area to be explored by antenna researchers. Proposed new geometry DRA has low loss, design flexibility, high efficiency, compact size and desired radiated beam control. Developing beam control in new geometry DRAs is investigated for the first time in this letter. Unique technique for beam control and beam width control is proposed using pit top and mount top DRA. Gain is controlled from 5.0 to 9.98 dBi and beam is controlled from ±30° to ±70° in broadside radiation pattern. U shape pit DRA has maximum directive gain of 9.98 dBi and efficiency 98% at 5.8 GHz frequency. Measured and simulated results of radiation pattern and reflection coefficient are found to be in close proximity. Hardware of U shape pit top DRA, mount top DRA, left side arc top DRA, right side arc shape top DRA is developed and investigated. Mobile and cellular communication network need wide coverage, hence large beam width is required. Narrowing of beam width at higher order mode is also achieved.

Enhancement Mode PHEMT for Single Supply High Efficiency Power Amplifiers

1999 ◽  
Author(s):  
Y. Tkachenko ◽  
A. Klimashov ◽  
C. Wei ◽  
Y. Zhao ◽  
D. Bartle
Keyword(s):  
Power Amplifiers ◽  
High Efficiency ◽  
Enhancement Mode
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