A Novel Design of Substrate Integrated Waveguide (SIW) E-Plane Inductive Strip Filter Implemented Using LTCC

2011 ◽  
Vol 8 (3) ◽  
pp. 121-128
Author(s):  
Ehab Abousaif ◽  
Aicha Elshabini ◽  
Fred Barlow
Keyword(s):  
Filter Design ◽  
Dielectric Material ◽  
Design Method ◽  
Coplanar Waveguide ◽  
Variation Principle ◽  
Band Pass Filter ◽  
Substrate Integrated Waveguide ◽  
Pass Filter ◽  
Metallic Strip ◽  
Design Steps

Low-temperature cofired ceramic (LTCC) was used for a novel band-pass filter design. The filter is based on metallic strips parallel to the E-plane and mounted in a substrate-integrated waveguide (SIW). A new iterative technique based on the variation principle was used to obtain the inductive reactance of equivalent T-network of the metallic strip. The design method of the filter was derived by applying the equivalent network of the metallic strip to the usual method of the filter design. A set of curves relating the various filter parameters is introduced. This filter was designed such that it is electromagnetically isolated inside the SIW and excited using grounded coplanar waveguide (GCPW) to SIW transitions; therefore, it can be easily integrated with MMICs. The design steps are explained and verified by examples and results. Three-dimensional electromagnetic field modeling and simulation was carried out using a high frequency structure simulator (HFSS). A comparison between different types of SIW is presented showing the resulting S-parameter curves for each case. By following the design steps, similar filters for various frequency bands using any dielectric material can be easily designed.

Waveguide Inductive Strip Filter Embedded in LTCC

2011 ◽  
Vol 2011 (CICMT) ◽  
pp. 000043-000049
Author(s):  
Ehab Abousaif ◽  
Aicha Elshabini ◽  
Fred Barlow
Keyword(s):  
Transmission Lines ◽  
Power Transmission ◽  
Filter Design ◽  
Dielectric Material ◽  
Design Method ◽  
Three Dimensional ◽  
Variation Principle ◽  
High Frequency Structure Simulator ◽  
Waveguide Filters ◽  
Inductive Elements

Microwave filters are generally designed with microwave transmission lines. However these filters are typically lossy. The waveguide filters using conventional inductive elements such as metal rods and transverse diaphragm have some disadvantages such as complicated structure, high cost and they can be hard to mass produce. But they also have many advantages such as the capability of high power transmission, a non-radiating structure, and their thermal efficiency. A novel waveguide inductive strip filter embedded in LTCC is introduced in this paper where the disadvantages of the conventional waveguide filters are eliminated. By using LTCC technology, the cost will typically be lower, it can easily be mass produce, and these designs can also be tested easily. The equivalent T-network parameters of the inductive strip mounted in a waveguide and embedded in LTCC substrate were derived. A new iterative technique was used based on the Variation principle. The design formulas and curves of the filter were presented. The design method of the filter was derived by applying the equivalent network of the inductive strip to the usual method of the filter design. A complete set of new curves relating the various filter parameters were introduced. Similar curves can be derived to design similar filters for any frequency band using any dielectric material. Three-dimensional electromagnetic field modeling and simulation was carried out using HFSS (High Frequency Structure Simulator). An optimization process was done for the designed filter. The modeling and the optimization S-parameters curves are shown. This paper introduces a new methodology of designing waveguide inductive strip filters embedded in LTCC. The design methodology was derived and presented with formulas and curves. The design steps are explained and verified by examples and results.

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 Wideband Band-Pass Filter Design Using Coupled Line Cross-Shaped Resonator

Electronics ◽  
2020 ◽  
Vol 9 (12) ◽  
pp. 2173
Author(s):  
Dong-Sheng La ◽  
Xin Guan ◽  
Shuai-Ming Chen ◽  
Yu-Ying Li ◽  
Jing-Wei Guo
Keyword(s):  
Bandpass Filter ◽  
Filter Design ◽  
Design Method ◽  
Band Pass Filter ◽  
Coupled Line ◽  
Pass Filter ◽  
Transmission Zeros ◽  
Coupled Lines ◽  
Band Pass ◽  
Line Cross

In this paper, a wideband bandpass filter with a coupled line cross-shaped resonator (CLCSR) is proposed. The proposed bandpass filter is composed of two open-end parallel coupled lines, one short-end parallel coupled line, one branch microstrip line, and the parallel coupled line feed structure. With the use of the even and odd mode approach, the transmission zeros and transmission poles of the proposed bandpass filter are analyzed. The coupling coefficient of the parallel coupled line feed structure is big, so the distance between the parallel coupled line is too small to be processed. A three microstirp lines coupled structure is used to realize strong coupling and cross coupling. This structure also can reduce the return loss in passband and increase the out-of-band rejection. The transmission zeros can be adjusted easily by varying the lengths of the open-end parallel coupled line or the short-end parallel coupled line. The proposed bandpass filter is fabricated and measured. The simulated results agree well with the measured ones, which shows that the design method is valid.

Digital all-pass filter design method based on complex cepstrum

2003 ◽  
Vol 39 (8) ◽  
pp. 695 ◽  
Author(s):  
G. Jovanovic-Dolecek ◽  
J. Diaz-Carmona
Keyword(s):  
Filter Design ◽  
Design Method ◽  
Pass Filter ◽  
Complex Cepstrum ◽  
Filter Design Method
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