Papers by Keyword: Millimeter-Wave

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Authors: Jiang An Han, Jun Xu
Abstract: A novel millimeter-wave transition from microstrip to rectangular waveguide is introduced in this paper. The theory for this design is explained. The strip conductor on microstrip, which is introduced from the center of a rectangular waveguide broad-wall to its E-plane, is shaped into a triangular loop in the waveguide terminated by a short circuit. A back to back transition operating at Ka band was simulated and fabricated. The experimental results showed the insertion loss of a back to back transition is less than 2.2dB with its return loss greater than 9.1dB from 26.5 GHz to 35.5 GHz.
Authors: Zhi Gang Wang, Hao Ding
Abstract: This paper presents a novel structure of millimeter-wave amplitude equalization based on low temperature co-fired ceramic (LTCC) technology, which is implemented by substrate integrated waveguide (SIW) resonator, thin film resistor, microstrip-line and metallic via hole probe. It has advantages of compact, easy for integration, low cost, low loss, and mass-producible. The effects of each component for equalizer performance have been analyzed by simulation. In order to validate the new proposed topology, a millimeter-wave gain equalizer is developed and verified by full-wave simulation using 9-layers Ferro A6 substrates. The designed equalizer exhibits excellent performances.
Authors: Cai Li Du, Ke He, Xue Chen
Abstract: A novel multipoint-to-multipoint bandwidth allocation algorithm named MP2MP-DBA based on 60GHz millimeter-wave communication is proposed for home network. Simulation results show that the MP2MP-DBA achieves better throughput and delay than static bandwidth allocation algorithm.
Authors: L. Yuan, James A. Cooper, Kevin J. Webb, M.R. Melloch
Authors: Shuang Zhao, Le Le Zhang
Abstract: In recent years, with the development of millimeter-wave MMIC chip, millimeter wave technology has been widely used. The millimeter-wave transmitter front-end is designed in this paper. By using second harmonic mixers, we reduce the operating frequency of the oscillator. By using the side exit microstrip - waveguide structure, we strengthen the compact structure. Test results show that the transmitter front-end transmission power is 33dB and its transmission band is 35.5-36GHz.
Authors: Shuang Zhao, Dian Ren Chen
Abstract: In this paper, a linearly polarized microstrip patch array antenna is analyzed based on the theory of cavity mode. Using the weighted parallel fed method, a 64 element linear polarization microstrip array antenna with a 35.5GHz center frequency is designed. Then we use the simulation software optimize the simulation model of the antenna. The simulation result shows that this antenna has a gain of 22dB, and low sidelobes.
Authors: Shuang Zhao, Dian Ren Chen
Abstract: The millimeter-wave transceiver front-end as a subsystem of high-frequency component is an important part of the radar, navigation, electronic warfare and communication systems. The millimeter receiver front-end developed herein, using the second harmonic mixer, reduces the frequency of the local oscillator. Using the bottom surface outlet ladder microstrip - waveguide structure, it strengthens the structure. Test results show that the developed front-end receiver has gain of 25dB and the transmit band is 35.5-36GHz.
Authors: Ming Xiao Ma
Abstract: This article describes a method of IF modulation used in millimeter-wave transmitter, the method is AD9857 combined with FPGA, choose the EP1C6 as a FPGA chip, and use this FPGA chip complete the base-band digital signal processing, and implement the control to the AD9857. AD9857 is a kind of the orthogonal frequency converter based on DDS technology, complete the functions of base-band digital signal interpolation filter, orthogonal modulation, and D/A conversion in the digital domain and complete QDPSK modulation signal output of 70MHz IF carrier. This method can eliminate phase and gain imbalances and distortion which caused by analog modulation, also can simplify the system structure, reduce cost and improve the performance and reliability of the system.
Authors: Yukio Makino, T. Yoshioka, H. Saito, Saburo Sano, Jun Akedo, Shoji Miyake
Abstract: Characteristics of heating processing based on millimeter-wave or pulsed high current are discussed from the standpoint of the interaction between electromagnetic energy and solid materials. Capabilities of the electromagnetic processing are indicated by exemplifying several successful results such as millimeter-wave sintering of AlN, millimeter-wave post-annealing of aerosol-deposited PZT films and synthesis of single-phase nano-structured anatase by SPS (or pulsed high current heating). It is shown in these examples that well-characterized properties such as high thermal conductivity and preferential orientation are created by the inherent effect due to the electromagnetic field, which is called microwave or SPS effect in millimeter-wave or SPS processing.
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