scholarly journals Design of broadband Class EF power amplifier based on low-pass filter matching structure

2019 ◽  
Vol 16 (12) ◽  
pp. 20190264-20190264 ◽  
Author(s):  
Zhiwei Zhang ◽  
Zhiqun Cheng ◽  
Guohua Liu
Keyword(s):  
Power Amplifier ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Low Pass ◽  
Matching Structure

Q-Band Compact Driver and Power Amplifier MMICs Matched by ?-type Low-Pass Filter Using Lumped Elements

1998 ◽  
Author(s):  
Shin Chaki ◽  
Takao Ishida ◽  
Yasuharu Nakajima ◽  
Yoshinobu Sasaki ◽  
Yasuo Mitsui
Keyword(s):  
Power Amplifier ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Low Pass ◽  
Lumped Elements

scholarly journals The Design of Terahertz Frequency Quadruplers Based on Discrete Schottky Diodes

Micromachines ◽  
2021 ◽  
Vol 13 (1) ◽  
pp. 69
Author(s):  
Yuhang Li ◽  
Dehai Zhang ◽  
Jin Meng ◽  
Haotian Zhu ◽  
Siyu Liu
Keyword(s):  
Output Power ◽  
Schottky Diodes ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Peak Output Power ◽  
W Band ◽  
Low Pass ◽  
Matching Structure ◽  
Better Than ◽  
Gradient Line

On the basis of the W-band power source, a single-stage frequency quadrupler method was used to implement two 335 GHz frequency quadruplers. The two frequency quadruplers adopted a traditional binomial matching structure and an improved gradient line matching structure, respectively. An idle loop was added to the overall circuit in the design of the DC filter and low-pass filter. The improved gradient line matching structure reduced the circuit length while increasing the bandwidth, effectively reducing the power loss on the transmission line. A micro-strip circuit was fabricated with a 50 μm thick quartz circuit and was mounted onto a split waveguide block. The results showed that the output power of the quadrupler with the improved matching structure was better than that of the quadrupler with the conventional matching structure. The peak output power of the improved frequency quadrupler was 4.75 mW at 333 GHz when driven with 200 mW. In contrast, this improved structure broadened the bandwidth by 8 GHz and reduced the length of the substrate by 0.607 mm, effectively reducing the length of the traditionally designed circuit by 11.5%.

Design of Excitation Source for Ultrasonic Guided Waves Based on DDS Technology

2014 ◽  
Vol 1049-1050 ◽  
pp. 674-677 ◽  
Author(s):  
Fen Ping Zhou ◽  
Yang Jiao ◽  
Hui Juan Duan
Keyword(s):  
Power Amplifier ◽  
Guided Waves ◽  
Guided Wave ◽  
Ultrasonic Guided Waves ◽  
Excitation Source ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Amplifier Circuit ◽  
Ultrasonic Guided Wave ◽  
Low Pass

According to the characteristics of ultrasonic guided wave inspection, An exciting power, used for exciting ultrasonic guided waves in pipeline is designed based on DDS and FPGA. The excitation source consists of FPGA, D/A conversion circuit, a low-pass filter circuit and power amplifier circuit. Constructing DDS based on FPGA as the controller and signal generator. Filter circuit and power amplifier circuit are designed in this paper. The experiment results show that the excitation source can have high voltage and high frequency output capability, and can generate desired signal type with a good accuracy to fit the requirements in practice. It can be conveniently used for pipeline ultrasonic guided wave detection.

Design of Programmable Wideband Low Pass Filter with Continuous-Time/Discrete-Time Hybrid Architecture

2017 ◽  
Vol E100.C (10) ◽  
pp. 858-865 ◽  
Author(s):  
Yohei MORISHITA ◽  
Koichi MIZUNO ◽  
Junji SATO ◽  
Koji TAKINAMI ◽  
Kazuaki TAKAHASHI
Keyword(s):  
Discrete Time ◽  
Continuous Time ◽  
Hybrid Architecture ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Low Pass

ANALYSIS AND IMPROVEMENT TECHNIQUES FOR THE TRANSFER FUNCTION OF A PLANAR LOW - PASS FILTER

2016 ◽  
Vol 15 (12) ◽  
pp. 2579-2586
Author(s):  
Adina Racasan ◽  
Calin Munteanu ◽  
Vasile Topa ◽  
Claudia Pacurar ◽  
Claudia Hebedean
Keyword(s):  
Transfer Function ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Low Pass

scholarly journals Simulating Elliptic Low-pass Filter based on MOCCCII

2020 ◽  
Vol 965 ◽  
pp. 012037
Author(s):  
Nanan Chomnak ◽  
Siradanai Srisamranrungrueang ◽  
Natapong Wongprommoon
Keyword(s):  
Pass Filter ◽  
Low Pass Filter ◽  
Low Pass
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