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Various kinds of broadband radio frequency integrated circuits for astronomical instrument were developed in Taiwan during past 18 years. In this paper the key technology and results, including the circuit design, testing, packaging and system integration are described.
This paper demonstrates the design and implementation of a miniaturized bandpass filter integrated with switch function in commercial GaAs pHEMT process for 3.5GHz WiMAX application. A tapped-input, capacitive-loaded hairpin-comb bandpass filter is proposed to benefit from the high-density metal-insulator-metal capacitor in the GaAs process, such that the required electrical length of coupled-line...
This paper presents two Q-band bandpass filter designs that are targeted for application in the Atacama large millimeter-wave and submillimeter-wave array (ALMA) radio telescope. The bandpass filter is required to reject the lower side band from 15.2~29 GHz and retain minimum loss across the passband of 31.3~45 GHz. The bandpass filter based on WR22 waveguide is first presented. Specifically, the...
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