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With the rapid development of the wireless technology, mixer, which is the main part of microwave receiver, has been demanded to be much more smaller and better performance. A low conversion loss k-band single balanced mixer is presented in this paper. The radio frequency (RF) signal and local oscillator (LO) signal are applied to one pair of mutually isolated ports of the 180-degree hybrid ring,...
Stretchable, flexible and tunable RF devices that are fabricated with Polydimethylsiloxane (PDMS) Electrically Conductive Composites (ECC) are presented. Using this composite material allows mechanical modulation of the device dimensions resulting in tuning of its frequency response. A planar loop antenna and a 5th order stepped impedance low pass filter operating around 1.5 GHz with tunability greater...
Aiming the great phase lag of the control-to-output small signal transfer function of LCC resonant converter, compensation networks composed of a band-stop filter and a single-pole-single-zero network are designed. Matlab and PSpice simulations are finished simultaneously, which verify that the output voltage can be regulated automatically in the disturbance of load changing. And good steady-state...
Since there is a great phase lag in the frequency characteristics of LCC resonant converter, a compensation network composed of a band-stop filter and a leading-and-lagging network is designed to stabilize the system. Simulation results verify that the output voltage can be regulated automatically under the disturbance of load changing and input fluctuation. And good steady-state accuracy and short...
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