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This paper presents a method to expand the bandwidth of conventional class-F power amplifier. Analysis indicates that small characteristic impedance of quarter-wave shorted-circuit transmission line in the harmonic control network is beneficial for PA design, as the second harmonic impedance varies less with frequency variation. A 10W GaN packaged transistor is used to verify the proposed method....
This work reveals the design for broadband GaAs Class-F power amplifier employed in terminal applications. The approximated continuous Class-F mode was analyzed and applied to GaAs device. A harmonic matching network was used to realize a broadband fundamental load impedance match while the second and third harmonic impedance are kept inside the high-efficiency region on the edge of the Smith chart...
A technique is developed in this letter to enhance the impedance and axial-ratio (AR) bandwidths as well as broadside gain of a sequential phase (SP) feed 2 2 patch array. The proposed antenna is composed of a probe-fed patch, a 22 corner truncated patch array with a loop, and a slotted metal wall surrounding the feeding structure. The proposed antenna combines the attractive features...
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