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This paper presents an implementation of RF passive components on a low resistivity Si substrate with a thick ajinomoto build-up film (ABF) to reduce electromagnetic field interaction with the Si substrate. The comparison of three coplanar waveguides (CPWs) on different Si substrates has been performed to provide feasibility of ABF-layer approach. After that, a bandpass filter and baluns have been...
In this paper, we present low temperature co-fired ceramic (LTCC)-based triplexers for both transmit (TX) and receive (RX) paths in worldwide interoperability for microwave access (WiMAX) tri-band front-end modules. The triplexer for TX path consists of 2- and 5-GHz lowpass filters, a 3-GHz bandpass filter, and a matching network. All components are fully embedded in an LTCC substrate, and it occupies...
This paper presents a front-end passive circuit module for ZigBee applications using low-temperature co-fired ceramic technology. The front-end part consists of an antenna, a bandpass filter, a switch, and two baluns. In antenna design, the solenoid shape is employed for reducing the size of the antenna, resulting in an overall size of 9times16.4times1.82 mm3 and a gain of -1.4 dBi. As for the filter,...
An ultrawide bandpass filter with sharp rejection and wider stopband is designed and implemented using multilayer ceramic configuration. The proposed filter is composed of a broadside coupled structure and a ring type filter with an embedded stripline stub. The measured results show that the fractional bandwidth and upper stopband of the proposed filter are 106% and better than -30 dB, respectively...
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