scholarly journals Tuning the Resonance Frequency and Miniaturization of a Novel Microstrip Bandpass Filter

2018 ◽  
Vol 15 (2) ◽  
pp. 24
Author(s):  
Abbas Rezaei ◽  
Leila Noori
Keyword(s):  
Resonance Frequency ◽  
Design Process ◽  
Insertion Loss ◽  
Return Loss ◽  
Bandpass Filter ◽  
Design Method ◽  
Open Loop ◽  
Input Admittance ◽  
Low Insertion Loss ◽  
Good Agreement

In this paper, a compact microstrip bandpass filter is designed using two open loop resonators. In order to obtain a tunable bandpass response with low insertion loss, two stubs are loaded inside them. The design process is based on obtaining the input admittance. Then, using the input admittance, a method is presented to control the resonance frequency and miniaturization simultaneously. The obtained insertion loss and the return loss at the resonance frequency are 0.1 dB and 19.7 dB respectively. To verify the design method, the proposed filter is fabricated and measured. The measured results are in good agreement with the simulated results.

scholarly journals Tuning the Resonance Frequency and Miniaturization of a Novel Microstrip Bandpass Filter

2018 ◽  
Vol 15 (2) ◽  
pp. 124
Author(s):  
Abbas Rezaei ◽  
Leila Noori
Keyword(s):  
Resonance Frequency ◽  
Design Process ◽  
Insertion Loss ◽  
Return Loss ◽  
Bandpass Filter ◽  
Design Method ◽  
Open Loop ◽  
Input Admittance ◽  
Low Insertion Loss ◽  
Good Agreement

In this paper, a compact microstrip bandpass filter is designed using two open loop resonators. In order to obtain a tunable bandpass response with low insertion loss, two stubs are loaded inside them. The design process is based on obtaining the input admittance. Then, using the input admittance, a method is presented to control the resonance frequency and miniaturization simultaneously. The obtained insertion loss and the return loss at the resonance frequency are 0.1 dB and 19.7 dB respectively. To verify the design method, the proposed filter is fabricated and measured. The measured results are in good agreement with the simulated results.

Broadband Transition between Rectangular Waveguide and Substrate Integrated Waveguide Based on Double Rhombus Antenna Probe

2014 ◽  
Vol 668-669 ◽  
pp. 799-802
Author(s):  
Hai Yan Jin ◽  
Teng Yue
Keyword(s):  
Insertion Loss ◽  
Rectangular Waveguide ◽  
Return Loss ◽  
Substrate Integrated Waveguide ◽  
Metal Waveguide ◽  
Low Insertion Loss ◽  
Better Than ◽  
Good Agreement

The paper presents a design of rectangular waveguide-SIW transition, which provides a broadband and low insertion loss performance. The broadband transition is realized by using double-rhombus antenna probe inserted into rectangular metal waveguide. The transition is simulated and measured at 9-20GHz. The measured results show that a good agreement with simulation and an insertion loss less than 2.8 dB and a return loss better than 10 dB are obtained at 10–18.5 GHz for a back-to-back structure.

scholarly journals PERANCANGAN DAN REALISASI BANDPASS FILTER DENGAN METODE OPEN LOOP SQUARE RESONATOR UNTUK MICROWAVE LINK

2016 ◽  
Vol 7 (3) ◽  
Author(s):  
Naufal Rizki Rinditayoga ◽  
Dian Widi Astuti
Keyword(s):  
Insertion Loss ◽  
Return Loss ◽  
Bandpass Filter ◽  
Open Loop ◽  
Vector Network Analyzer ◽  
Network Analyzer ◽  
Point To Point ◽  
Microwave Link

Dalam  dunia  telekomunikasi,  antena  parabola ini  dipakai  oleh  perangkat  yang dinamai  perangkat  transmisi  radio  microwave (gelombang  mikro) point  to  point.  Microwave link  sendiri  merupakan  sistem  komunikasi  yang  menggunakan  gelombang  radio  pada  rentang frekuensi gelombang mikro untuk mengirimkan video, audio, atau data antara dua lokasi yang terpisah, yang dapat digunakan hanya beberapa meter sampai dengan beberapa kilometer. Untuk mendukung    teknologi  tersebut,  tidak  lepas  dari  sebuah  yang  bernama  filter.  Filter  sendiri merupakan salah satu komponen penting dalam komunikasi wireless.Dasar  penelitian  ini  yaitu  bertujuan  untuk  membuat  sebuah  bandpass  filter  yang  dapat meloloskan frekuensi pada microwave link yaitu pada frekuensi 7,1 GHz – 7,7 GHz. Dari hasil pengukuran respon filter pada alat vector network analyzer didapatkan hasil yang berbeda antara spesifikasi,  simulasi  dan  fabrikasi.  Hasil  dari  penelitian  ini  Bandpass  filter  bekerja  pada frekuensi 7,1 – 7,7 GHz. Pada hasil simulasi menggunakan HFSS didapatkan nilai return loss (S11)  filter  sebesar  -27,48 dB  dan  insertion loss (S21)  sebesar  -0,43 dB. Sedangkan pada hasil pengukuran  menggunakan  VNA  didapatkan  nilai  return  loss  (S11)  filter  sebesar  -28,2  dB  dan insertion loss (S21) sebesar -0,53 dBKata  kunci  :  Bandpass  filter,    Open  Loop  Square  Resonator,  Microwave  link

scholarly journals Substrate integrated waveguide bandpass filter for short range device application using rectangular open loop resonator

2021 ◽  
Vol 11 (5) ◽  
pp. 3747
Author(s):  
Dian Widi Astuti ◽  
Rizki Ramadhan Putra ◽  
Muslim Muslim ◽  
Mudrik Alaydrus
Keyword(s):  
Short Range ◽  
Return Loss ◽  
Bandpass Filter ◽  
Open Loop ◽  
Frequency Region ◽  
Substrate Integrated Waveguide ◽  
Network Analyzer ◽  
Measurement Results ◽  
Simulation Results ◽  
Good Agreement

The substrate integrated waveguide (SIW) structure is the candidate for many application in microwave, terahertz and millimeter wave application. It because of SIW structure can integrate with any component in one substrate than others structure. A kind components using SIW structure is a filter component, especialy bandpass filter. This research recommended SIW bandpass filter using rectangular open loop resonator for giving more selectivity of filter. It can be implemented for short range device (SRD) application in frequency region 2.4 - 2.483 GHz. Two types of SIW bandpass filter are proposed. First, SIW bandpass filter is proposed using six rectangular open loop resonators while the second SIW bandpass filter used eight rectangular open loop resonators. The simulation results for two kinds of the recommended rectangular open loop resonators have insertion loss (S<sub>21</sub> parameter) below 2 dB and return loss (S<sub>11</sub> parameter) more than 10 dB. Fabrication of the recommended two kind filters was validated by Vector Network Analyzer. The measurement results for six rectangular open loop resonators have 1.32 dB for S<sub>21</sub> parameter at 2.29 GHz while the S<sub>11</sub> parameter more than 18 dB at 2.26 GHz – 2.32 GHz. While the measurement results has good agreement for eight rectangular open loop resonators. Its have S<sub>21</sub> below 2.2 dB at 2.41 – 2.47 GHz and S<sub>11</sub> 16.27 dB at 2.38 GHz and 11.5 dB at 2.47 GHz.

New Microstrip Diplexer for Recent Wireless Applications

2018 ◽  
Vol 7 (3.4) ◽  
pp. 96 ◽  
Author(s):  
Yaqeen S. Mezaal ◽  
Seham A. Hashim ◽  
Aqeel H.Al-fatlawi ◽  
Hussein A. Hussein
Keyword(s):  
Insertion Loss ◽  
Return Loss ◽  
Design Method ◽  
Open Loop ◽  
Coupled Resonators ◽  
Wireless Applications ◽  
Frequency Responses ◽  
Operating Band ◽  
Dual Channel ◽  
Better Than

In this study, dual-channel diplexer using microstrip open loop coupled resonators has been designed and simulated; each channel has two operating band frequencies. This microstrip diplexer is designed for (1.424/1.732GHz) for first channel and (2.014/2.318GHz) for second channel. The simulated results for this device have insertion loss (1.8 and 1 dB) at load 1, and (1.5 and 3 dB) at load 2. Additionally, it has reasonable return loss magnitudes better than 10 dB and effective isolation between channels of35 dB. The proposed design has shown an uncomplicated topology, an effectual design method, small circuit size and narrowband frequency responses that are fitting for multi service wireless schemes.  

Compact Ultra-Wide Upper Stopband Microstrip Dual-Band BPF Using Tapered and Octagonal Loop Resonators

Frequenz ◽  
2020 ◽  
Vol 74 (1-2) ◽  
pp. 61-71 ◽  
Author(s):  
Shiva Khani ◽  
Mohammad Danaie ◽  
Pejman Rezaei ◽  
Ali Shahzadi
Keyword(s):  
Design Process ◽  
Insertion Loss ◽  
Return Loss ◽  
Bandpass Filter ◽  
Analytical Description ◽  
Dual Band ◽  
Equivalent Circuits ◽  
Attenuation Level ◽  
S Matrix

AbstractIn this paper, a microstrip dual-band bandpass filter (DBBPF) based on an octagonal loop resonator (OLR), tapered resonators and open bended stubs (OBSs) is designed and analysed. The proposed structure produces two passbands with the centre frequencies of 3.65 and 5.67 GHz. The marked advantages of the proposed filter are as follows: Two centre frequencies can be individually tuned. The bandwidth of the upper passband can also be controlled. Furthermore, the DBBPF benefits from an ultra-wide upper stopband from 5.9 up to 21 GHz with an attenuation level of higher than 20 dB and a small size of 0.21 λg × 0.26 λg, where λg is the guided wavelength at 3.65 GHz. The designed filter is horizontally and vertically symmetrical leading to a reciprocal S matrix. Other remarkable specifications of the proposed filter are the insertion loss < 0.62 dB, the return loss > 20.2 dB and sharp response. To provide an analytical description, the LC equivalent circuits of initial and main resonators are presented. Acceptable similarity between simulated and measured results verifies the design process.

scholarly journals A Compact Dual-Mode Bandpass Filter with High Out-of-Band Suppression Using a Stub-Loaded Resonator Based on the GaAs IPD Process

Electronics ◽  
2020 ◽  
Vol 9 (5) ◽  
pp. 712 ◽  
Author(s):  
Wei Zhang ◽  
Zhao Yao ◽  
Jie Zhang ◽  
Eun Seong Kim ◽  
Nam Young Kim
Keyword(s):  
Insertion Loss ◽  
High Performance ◽  
Return Loss ◽  
Bandpass Filter ◽  
Open Loop ◽  
Fabrication Process ◽  
Dual Mode ◽  
Transmission Zeros ◽  
Semiconductor Fabrication ◽  
Device Size

In this letter, a compact dual-mode bandpass filter (BPF) with an ultra-wide stopband that employs two folded open-loop resonators (FOLRs) and stub-loaded resonators (SLRs) is proposed. The dual-mode resonators are optimized by loading two SLRs onto the folded open-loop resonators, and this process is analyzed using the dual-mode theory. To miniaturize the device size and increase chip performance, the proposed BPF is fabricated by a III–V compound semiconductor-fabrication process using a high-performance GaAs substrate based on the integration passivation device (IPD) fabrication process. A compact dual-mode BPF with low insertion loss and high return loss is designed and fabricated. Two extra transmission zeros (TZs) located in the high-frequency range increase the wide stopband, and the two TZs near the passband result in a higher selectivity. A resonant frequency centered at 7.45 GHz with an insertion loss of −1.21 dB and a measured return loss of higher than −23.53 dB and 3 dB fractional bandwidths of 5.8% are achieved. The stopband can be suppressed up to 20 GHz owing to the two tunable TZs resulting in higher selectivity and wideband rejection. The size of the filter was drastically optimized using a simplified architecture of two FOLRs and SLRs.

Design of Microstrip LPF with Sharp Cut-off Frequency and Wide Stopband

Frequenz ◽  
2014 ◽  
Vol 0 (0) ◽  
Author(s):  
G. Karimi ◽  
M. Yazdani ◽  
H. Siahkamari ◽  
A. Lalbakhsh
Keyword(s):  
Insertion Loss ◽  
Return Loss ◽  
Lowpass Filter ◽  
Transition Band ◽  
High Return ◽  
In Series ◽  
Low Insertion Loss ◽  
Simulation Results ◽  
Good Agreement

AbstractA novel lowpass filter with wide stopband and sharp skirt characteristics is proposed. To obtain the applicable lowpass filter, several cells of coupled T-shaped resonator, U-shape and dumbbell-shaped resonators are connected in series. The proposed filter has low insertion loss, high return loss in the passband and wide stopband. The transition band is from 3.18 to 3.29 GHz with −3 and −20 dB, respectively. Results of the fabricated filter exhibit a roll-off and relative stopband bandwidth of 217 and 137%, respectively. Measurement and simulation results show good agreement.

Miniaturized bandpass filter using coupled lines for wireless applications

Frequenz ◽  
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Abbas Mohamadinia ◽  
Farzin Shama ◽  
Mohammad Amir Sattari
Keyword(s):  
Insertion Loss ◽  
Return Loss ◽  
Bandpass Filter ◽  
Analytical Description ◽  
Coupled Line ◽  
Wireless Applications ◽  
High Return ◽  
Coupled Lines ◽  
Low Insertion Loss ◽  
Lc Equivalent Circuit

Abstract In this paper, a bandpass filter (BPF) has been designed using bent and coupled-line structure. The design process of the filter to achieve a BPF with good characteristics is completely explained. Therefore the LC equivalent circuit of The BPF is presented as the analytical description. The proposed filter can pass frequencies between 2.2 and 3.6 GHz with an insertion loss <0.4 dB, which is suitable for wireless applications. The fractional bandwidths (FBW) of the filter is about 48%. Some characteristics such as small size, low insertion loss, high return loss wide upper stopband bandwidth, and good suppression level in stopband are among the advantages of this study to be mentioned. Finally, the presented filter was fabricated, and the measured results have a proper agreement with the simulation results.

scholarly journals Perancangan Dualband Bandpass Filter dengan Metode Square Open Loop Resonator pada Frekuensi 2100 MHz

Transmisi ◽  
2018 ◽  
Vol 20 (3) ◽  
pp. 133 ◽  
Author(s):  
Agnes Yora Gracia Simatupang ◽  
Teguh Prakoso ◽  
Imam Santoso
Keyword(s):  
Insertion Loss ◽  
Return Loss ◽  
Bandpass Filter ◽  
Open Loop ◽  
Lumped Element

Tapis (filter) merupakan komponen yang berperan penting dalam suatu sistem telekomunikasi. Tapis digunakan untuk menyeleksi frekuensi yang akan dilewatkan dalam melakukan telekomunikasi. Perkembangan sistem telekomunikasi membuat penggunaan band frekuensi yang semakin meluas, sehingga frekuensi yang digunakan juga frekuensi yang tinggi pula. Tapis dapat dirancang secara sederhana menggunakan lumped element yang terdiri dari kapasitor, resistor, dan juga induktor. Namun tapis ini mempunyai keterbatasan yaitu hanya dapat digunakan pada frekuensi rendah saja dan tidak efektif untuk frekuensi tinggi. Tapis yang dapat digunakan pada frekuensi tinggi dapat dirancang menggunakan mikrostrip. Bentuk-bentuk tapis mikrostrip pun beranekaragam, salah satunya adalah square open loop resonator. Penelitian ini akan membahas tentang perancangan tapis dualband dengan metode square open loop resonator pada frekuensi 2100 MHz menggunakan software CST Studio Suite 2016. Respon frekuensi yang dihasilkan oleh desain akhir dari tapis ini dapat meloloskan frekuensi pada rentang 1927 MHz-2175 MHz dan 3021 MHz – 3296 MHz. Nilai insertion loss yang dihasilkan sebesar 1,4283 dB pada band bawah dan return loss sebesar 19,707 dB pada band bawah.

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