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This paper proposes a vertical transition between microstrip line and substrate integrated waveguide (SIW) on multilayer low-temperature co-fired ceramic (LTCC) as well as its equivalent circuit model. The transition structure is realized by a shorted via between microstrip line and the bottom of SIW. The equivalent model is derived by calculating the input impedance in waveguide and the simulation...
In this paper, the design of a compact planar bandpass filter above a defected ground plane is presented. The filter is designed as a combination of microstrip resonators and exploits the properties of a planar electromagnetic bandgap (EBG) structure patterned unto the ground plane of the printed circuit board material to provide a very wide stopband of up to 5 times the fundamental frequency. The...
A high intercept points, cost-effective, and power-efficient switching FET double balanced mixer (DBM) is reported. The Switching FET DBM demonstrated in this work offers input intercept points (IIP3) and conversion loss typically 44 dBm and 8.5 dB respectively with 15 dBm LO power for the frequency band (RF: 900-2150 MHz, LO: 850-1950 MHz, IF: 50-200 MHz). The measured interport isolation is typically...
We derived an equivalent circuit for a figure-8 coil type permeance meter in order to analyze its LC resonance characteristics. The equivalent circuit for the pickup coils was derived by using the same analytical techniques as for thin-film inductors. The driving sheets and twisted lead wires were modeled according to the theory of distributed constant networks. We made a permeance meter, measured...
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