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The terahertz technique has been a hot research topic in recent years owing to its unique characteristics for potential applications such as high resolution spectrometers and high data rate space communications. Rapidly growing research activities from worldwide researchers have been involved in developing terahertz components. This paper reports some typical achievements of developing terahertz components...
This paper presents a 40–50 GHz power amplifier (PA) with flat gain response using TSMC 90 nm CMOS technology. The PA is a three-stage design with a first stage single-ended amplifier to drive a two stage balanced amplifier. Cascode configuration is employed in each stage to provide high small-signal gain. A gain-boosting technique is introduced in the cascode configuration of the PA to extend high-frequency...
A Q-band divide-by-2 injection-locked frequency divider (ILFD) is presented in this paper. A common-centroid cross-coupled transistor pair structure is adopted to reduce the gate-drain capacitance for widening the locking range. The whole layout of the ILFD is simulated using a 3D electromagnetic (EM) simulator for a one-pass success, and a good match between the simulation and measurement results...
A Q-band compact two-way 3dB Wilkinson power divider is developed using asymmetrical shunt-stub and meander lines. The prototype is fabricated in a 90nm CMOS technology. The measurement results, which match the 50 Ω system, reveal an equal power-split with the insertion losses (S21 and S31) of 3.9 ± 0.3dB from 40 to 50 GHz. The return loss at every port (S11, S22 and S33) is better than 12dB from...
A miniaturized 3-dB branch-line coupler based on substrate integrated coaxial line (SICL) technology is presented. The proposed SICL coupler is nearly shielded and takes the merits of low insertion loss, extremely low radiation loss, and insensitive to outside interference, etc. By using an equivalent π-type topology to replace the quarter-wavelength SICLs, the miniaturized SICL coupler achieves 72...
This paper presented a novel method to realize millimeter wave integrated antenna and waveguide. The antenna has bandwidth great than 90 GHz and its measured gain is about 10.8 dB Pattern of the antenna has been measured and agree with the simulated results.
A silicon based THz substrate integrated waveguide (SIW) bandpass filter with a pair of antipodal linearly tapered slot Antennas (ALTSA) is designed and fabricated with MEMS process. A prototype with passband range 350GHz~370GHz is measured by using a quasi-optic measurement system. The measured data are in agreement with the simulated results, which show the filter has good selection performance...
For low microwave band, the size of substrate integrated waveguide (SIW) couplers still need to be further reduced though other advantages of low profile, low insertion loss, low cost etc. are very remarkable. In this letter, novel substrate integrated folded waveguide (SIFW) narrow-wall single-slot and double-slot directional couplers are designed and implemented. The measured results are in good...
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