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Adjacent channel leakage power ratio (ACLR) improvement method of a 5-GHz power amplifier using high-temperature superconducting reaction-type transmitting filters (HTS-RTF) is proposed. The aim of this paper is to clarify the amount of ACLR improvement which is offered by HTS-RTFs. Firstly, measurement results of ACLR improvement using a prototype filter is introduced. The prototype filter has an...
In order to meet stringent requirements on transmit filters, high-Tc superconducting dual-mode disk resonators with attenuation poles have been designed, fabricated, and measured. Using a ground-slot perturbation along the asymmetric plane from the feeder lines, the resonator fabricated with YBCO superconducting double-sided films showed high performance with attenuation poles at the both sides of...
An high-temperature superconducting reaction-type transmitting filter (HTS-RTF) based upon split open-ring resonators with novel surface current density reduction technique is proposed. Since reaction-type resonators do not resonate with high-power fundamental signals, an HTS-RTF enables both high-power handling capability and steep skirt property compared to existing planar-type HTS transmitting...
Novel planar construction of high-temperature superconducting (HTS) filters that improve power-handling capability is proposed. Split open-ring resonators are developed to be used in reaction-type transmitting filters that have very sharp bandstop characteristics. Resonator structures to achieve high-unloaded Q-factors and low radiation as well as low surface current densities in the passband are...
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