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It is our great pleasure to invite you to attend the 2016 International Conference on Microwave and Millimeter Wave Technologies (ICMMT2016), which is the 9th of the consecutive series initiated in 1998 to be held in China. We cordially welcome you to ICMMT2016. Besides, we would like to take this opportunity to express our sincere appreciation to the leading scientists, session organizers and all...
On behalf of the Technical Program Committee (TPC), we welcome all of you to attend the 2016 International Conference on Microwave and Millimeter Wave Technology (ICMMT2016) in Beijing, China.
According to the requirements for the antenna in the portable stroke imaging detection system, a miniaturized ultra-wideband antenna unit is presented in this paper. The size of antenna is 40 × 40 × 0.6 mm3 and measured working frequency (S11 < −10 dB) is 1 GHz to 4 GHz. The fabricated antenna is applied into the brain stroke detection experiment using simplified brain model. The results show the...
A zero-index metamaterial (ZIM) structure is proposed for the gain enhancement of a planar Quasi-Yagi antenna on X-band. The zero permittivity point of the proposed ZIM structure is obtained at the frequency around 8.5 GHz. The ZIM unit cells are layout into the aperture of a planar Quasi-Yagi antenna to improve the gain performance. Two antennas are simulated and fabricated for a comparison, the...
This paper presents a novel design and demonstration of a linearly polarized lens antenna with planar antenna feeders. The lens consists of four identical metallic array printed on three identical dielectric slabs. The thickness is only 3 mm or 0.22 λ at the operating frequency, 22 GHz. To make the antenna structure compact, the planar small antenna feeder instead of a horn is investigated. Simulations...
This paper designs a small and triple-band printed monopole antenna for wireless local area network (WLAN) and worldwide interoperability for microwave access (WiMAX). The proposed antenna by working in different frequency bands of monopole antenna adds together and consists of two L-shaped patch and a semicircle patch on the front side of the substrate and an irregular rectangular patch on the back...
The proposed leaky-wave (LW) antenna is a passive circuit built using the half-mode substrate integrated waveguide (HMSIW) technology. By etching interdigital slots as capacitive components on the HMSIW surface, a balanced composite right/left-handed (CRLH) structure is realized. This CRLH HMSIW leaky-wave antenna has a continuous beam-steering capability from −20° in the left-handed region to +15°...
This paper expounds on the design of Doherty power amplifier. The principle of Doherty power amplifier is analyzed detailedly. We also introduce the procedure of designing matching networks. A Doherty power amplifier at band 2.11–2.17GHz is simulated with the MRF8S21120H transistor. The P1dB is above 52dBm, and its efficiency is above 41% in 6dB back-off region. It demonstrates an efficiency improvement...
A 3-stage wideband low-noise amplifier (LNA) which operates from 45 GHz to 70 GHz is presented in this paper. A cascode amplifier with an active feedback is adopted in the first stage to realize broadband and partial noise cancelling. The capacitive cross-coupling (CCC) neutralization technology is used in the second and third stages to obtain a high gain and reverse isolation. Simulated results show...
In this paper, we report the design methods and numerical results for a novel and compact circular waveguide TM02-TE11 mode converter, which has a high pure TE11 mode output. The converter has been designed to transform the high order TM02 circular waveguide output mode from relativistic backward-wave oscillators into the fundamental TE11 circular waveguide mode. The results show that the purity of...
In this paper, a simplified method of digital predistortion (DPD) based on the feedback for single power amplifier (PA) is proposed to linearize beamforming Multiple-Input Multiple-Output (MIMO) transmitter. In MIMO beamforming transmitter, a couple of radio frequency (RF) channels are paralleled to transmit signals simultaneously, it is almost impractical to perform linearization for each channel...
In this paper, a simple orthomode transducer (OMT) operating at 45GHz band is presented. The proposed design avoids the use of septum, irises, pins, or small features. The OMT has few steps, low loss and good isolation, which showed both in the simulated and measured results.
High frequency characteristics of 220GHz folded waveguide slow wave structure were studied and a 220GHz three-section variable period folded waveguide TWT was designed. Compared with three-section uniform-period folded waveguide TWT and two-section variable-period folded waveguide TWT, three-section variable-period folded waveguide TWT had the highest output power and electronic efficiency.
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