scholarly journals A Novel Design Method of Direct Coupled BPF(Band Pass Filter) Based on EM Simulation of Individual Resonator

2009 ◽  
Vol 20 (4) ◽  
pp. 333-343 ◽  
Author(s):  
Seong-Sik Yang ◽  
Kyung-Whan Yeom
Keyword(s):  
Design Method ◽  
Band Pass Filter ◽  
Pass Filter ◽  
Band Pass ◽  
Em Simulation ◽  
Novel Design

The Design and Simulation of the Array Induction Logging Tools’ Signal Conditioning Circuit

2012 ◽  
Vol 241-244 ◽  
pp. 1010-1013
Author(s):  
Yao Hu ◽  
Hong Lu Hu ◽  
Ding Jin Huang
Keyword(s):  
Relative Error ◽  
Design Method ◽  
Center Frequency ◽  
Band Pass Filter ◽  
Pass Filter ◽  
Band Filter ◽  
Induction Logging ◽  
Band Pass ◽  
Two Stages ◽  
Signal Conditioning Circuit

Array induction logging tools (AILT) detects the stratum conductivity based on the principle of electromagnetic induction, as a result, the signal of the amplitude using the AILT is in microvolt level. The small-signal is always drowned by noise at high-temperature and high-pressure condition. In order to collect the weak signal accurately, we propose a design method of signal modulator circuits based on the principle of differential amplifier and active band-pass filter with second band limitless gain and multi-path negative feedback. First, make the induction signal obtained from the coil two stages amplification. Then Execute two-order band-pass filter to the enlarged signal. At last, process the filtered signal by the backward circuits. Simulating the circuits by Pspice16.3, The result of simulation indicated that the gain relative error of preamplifier is less than 1% and the center frequency relative error of band filter is less than 4%. These data suggest that the relative error of the design circuits is less than routine instrument by 5%. So the Simulation verifies the feasibility of the signal modulator circuit.

Co-design method for dual-band low-noise amplifier and band-pass filter

2012 ◽  
Vol 99 (4) ◽  
pp. 585-595 ◽  
Author(s):  
Runbo Ma ◽  
Wenmei Zhang ◽  
Guorui Han ◽  
Li Li ◽  
Xinwei Chen ◽  
...  
Keyword(s):  
Design Method ◽  
Low Noise ◽  
Low Noise Amplifier ◽  
Dual Band ◽  
Band Pass Filter ◽  
Pass Filter ◽  
Band Pass ◽  
Noise Amplifier

HF Voltage-Controllable Band-Pass Filter Based on Varactor

2014 ◽  
Vol 631-632 ◽  
pp. 327-332
Author(s):  
Sheng Qian Ma ◽  
Chang Rong Zhao ◽  
Yan Ping Ji
Keyword(s):  
Filter Design ◽  
Design Method ◽  
Center Frequency ◽  
Resonant Circuit ◽  
Band Pass Filter ◽  
Pass Filter ◽  
Junction Capacitance ◽  
Function Expression ◽  
Band Pass ◽  
And Function

Varactor to replace commonly variable capacitance is applied to the tuner. This paper presents the voltage-controllable band-pass filter design method. The filter constitutes of operational amplifier, resistors, varactor MV209 and parallel LC resonant circuit. Center frequency range of the band-pass filters is from 19MHz to 25MHz controlled with DC voltage. It derives the transfer function of the filter and function expression of junction capacitance with reverse voltage. The frequency response of filter simulation and experimental results are given. Key words: Varactor; Band-Pass Filter; Voltage-Controllable Filter; Junction Capacitance

scholarly journals Band pass filter comparison of Hairpin line and square open-loop resonator method for digital TV community

2021 ◽  
Vol 10 (1) ◽  
pp. 101-110
Author(s):  
Budi Prasetya ◽  
Yuyun Siti Rohmah ◽  
Dwi Andi Nurmantris ◽  
Sarah Mulyawati ◽  
Reza Dipayana
Keyword(s):  
Filter Design ◽  
Design Method ◽  
Digital Tv ◽  
Open Loop ◽  
Digital Television ◽  
Band Pass Filter ◽  
Pass Filter ◽  
Community Band ◽  
Band Pass ◽  
The Right

The selection of the right filter design method is a very important first step for a radio frequency engineer. This paper presents the comparison of two methods of band pass filter design using hairpin-line and square open-loop resonator. Both methods were applied to obtain filter designs that can work for broadcasting system in digital television community. Band pass filter was simulated using design software and fabricated using epoxy FR-4 substrate. The results of simulation and measurement shown return loss value at 27.3 dB for hairpin line band pass filter and 25.901 for square open-loop resonator band pass filter. Voltage standing wave ratio parameter values were 1.09 and 1.1067 for hairpin line and square open-loop band pass filter respectively. The insertion loss values for the Hairpin line band pass filter and square open-loop band pass filter were 0.9692 and near 0 dB, respectively. Fractional bandwidth, for hairpin line band pass filter, was 6.7% while for square open-loop band pass filter was 4.8%. Regarding the size, the dimension of square open-loop resonator was approximately five times larger than hairpin-line band pass filter. Based on the advantages of the hairpin line method, we recommend that researchers choose the filter for digital TV broadcasting.

scholarly journals Multilayer End Coupled Band Pass Filter using Low-Temperature Co-Fired Ceramic Technology for Broadband Fixed Wireless

2018 ◽  
Vol 10 (3) ◽  
pp. 980
Author(s):  
Zulkifli Ambak ◽  
Hizamel M. Hizan ◽  
Ahmad Ismat Abdul Rahim ◽  
Azmi Ibrahim ◽  
Mohd Zulfadli M. Yusoff ◽  
...  
Keyword(s):  
Low Temperature ◽  
Design Method ◽  
Ceramic Technology ◽  
Center Frequency ◽  
Band Pass Filter ◽  
Pass Filter ◽  
Three Samples ◽  
Band Pass ◽  
Fixed Wireless ◽  
Multilayer Substrate

This paper presents design approach for realizing multilayer End Coupled Bandpass Filter (ECBPF) using low temperature co-fired ceramic (LTCC) technology at TMRND's LTCC Lab. Design method for the ECBPF is based on the coupled-resonator filter which was realized in LTCC multilayer substrate and operating at the center frequency of 42GHz. Three samples of EC BPF have been designed, simulated, fabricated and investigated in terms of performance and structure size.This multilayer ECBPF were fabricated in the 8 layers LTCC Ferro A6S materials with dielectric constant of 5.8, loss tangent of 0.002 and metallization of gold. The measured insertion loss for ECBPF was 2.43dB and return loss was 22.81dB at the center frequency at 42GHz. The overall size of the fabricated filter was 6.0 mm x 2.5 mm x 0.77 mm.

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