scholarly journals A Microfabricated Bandpass Filter with Coarse-Tuning and Fine-Tuning Ability Based on IPD Process and PCB Artwork

Micromachines ◽  
2022 ◽  
Vol 13 (1) ◽  
pp. 123
Author(s):  
Junzhe Shen ◽  
Tian Qiang ◽  
Minjia Gao ◽  
Yangchuan Ma ◽  
Junge Liang ◽  
...  
Keyword(s):  
Printed Circuit Board ◽  
Bandpass Filter ◽  
Fine Tuning ◽  
Circuit Board ◽  
Center Frequency ◽  
Spiral Inductor ◽  
Chip Area ◽  
Transmission Zero ◽  
Capacitance Variation ◽  
Zero Frequency

In this paper, a bandpass filter (BPF) was developed utilizing GaAs-based integrated passive device technology which comprises an asymmetrical spiral inductor and an interleaved array capacitor, possessing two tuning modes: coarse-tuning and fine-tuning. By altering the number of layers and radius of the GaAs substrate metal spheres, capacitance variation from 0.071 to 0.106 pF for coarse-tuning, and of 0.0015 pF for fine-tuning, can be achieved. Five air bridges were employed in the asymmetrical spiral inductor to save space, contributing to a compact chip area of 0.015λ0 × 0.018λ0. The BPF chip was installed on the printed circuit board artwork with Au bonding wire and attached to a die sink. Measured results demonstrate an insertion loss of 0.38 dB and a return loss of 21.5 dB at the center frequency of 2.147 GHz. Furthermore, under coarse-tuning mode, variation in the center frequency from 1.956 to 2.147 GHz and transmission zero frequency from 4.721 to 5.225 GHz can be achieved. Under fine-tuning mode, the minimum tuning value and the average tuning value of the proposed BPF can be accurate to 1.0 MHz and 4.7 MHz for the center frequency and 1.0 MHz and 12.8 MHz for the transmission zero frequency, respectively.

scholarly journals A New Ultracompact Narrow Bandpass Microstrip Filter Using Double-Negative Quasiplanar Cells

2020 ◽  
Vol 2020 ◽  
pp. 1-6
Author(s):  
Mohammad Reza Khawary ◽  
Vahid Nayyeri ◽  
Seyed Mohammad Hashemi ◽  
Mohammad Soleimani
Keyword(s):  
Printed Circuit Board ◽  
High Selectivity ◽  
Bandpass Filter ◽  
Circuit Board ◽  
Center Frequency ◽  
Double Negative ◽  
Fractional Bandwidth ◽  
Printed Circuit ◽  
Full Wave ◽  
Good Agreement

This paper presents a novel ultracompact narrow bandpass filter with high selectivity. The proposed filter is composed of cascading two basic cells. Each cell is basically a microstrip line loaded with a quasiplanar resonator and series gaps which can be fabricated using a standard multilayer printed circuit board technology. The structure is analyzed through an equivalent circuit and full-wave simulations. The simulation results are compared with experimental measurements demonstrating a good agreement between them. The measurement indicates that the realized bandpass filter at the center frequency of 1 GHz has a fractional bandwidth of 2.2%. Most importantly, in comparison with other similar recent works, it is shown that the proposed filter has the smallest size.

scholarly journals On-Chip Miniaturized Bandpass Filter Using GaAs-Based Integrated Passive Device Technology For L-Band Application

Materials ◽  
2019 ◽  
Vol 12 (18) ◽  
pp. 3045 ◽  
Author(s):  
Bao-Hua Zhu ◽  
Nam-Young Kim ◽  
Zhi-Ji Wang ◽  
Eun-Seong Kim
Keyword(s):  
Printed Circuit Board ◽  
Bandpass Filter ◽  
Circuit Board ◽  
Center Frequency ◽  
Performance Measurements ◽  
Passive Device ◽  
Bridge Structures ◽  
Embedded Capacitor ◽  
On Chip ◽  
Insertion Losses

In this work, a miniaturized bandpass filter (BPF) constructed of two spiral intertwined inductors and a central capacitor, with several interdigital structures, was designed and fabricated using integrated passive device (IPD) technology on a GaAs wafer. Five air-bridge structures were introduced to enhance the mutual inductive effect and form the differential geometry of the outer inductors. In addition, the design of the differential inductor combined with the centrally embedded capacitor results in a compact construction with the overall size of 0.037λ0 × 0.019λ0 (1537.7 × 800 μm2) where λ0 is the wavelength of the central frequency. For the accuracy evolution of the equivalent circuit, the frequency-dependent lumped elements of the proposed BPF was analyzed and modeled through the segment method, mutual inductance approach, and simulated scattering parameters (S-parameters). Afterward, the BPF was fabricated using GaAs-based IPD technology and a 16-step manufacture flow was accounted for in detail. Finally, the fabricated BPF was wire-bonded with Au wires and packaged onto a printed circuit board for radio-frequency performance measurements. The measured results indicate that the implemented BPF possesses a center frequency operating at 2 GHz with the insertion losses of 0.38 dB and the return losses of 40 dB, respectively, and an ultrawide passband was achieved with a 3-dB fraction bandwidth of 72.53%, as well. In addition, a transmission zero is located at 5.32 GHz. Moreover, the variation of the resonant frequency with different inductor turns and metal thicknesses was analyzed through the simulation results, demonstrating good controllability of the proposed BPF.

Practical Implementation of Frequency Monitoring for Widely Tunable Bandpass Filters

2010 ◽  
Vol 2010 (1) ◽  
pp. 000874-000880
Author(s):  
Hjalti H. Sigmarsson ◽  
Evan Binkerd ◽  
Jeff Maas ◽  
Juseop Lee ◽  
Dimitrios Peroulis ◽  
...  
Keyword(s):  
Printed Circuit Board ◽  
Practical Method ◽  
Tunable Filter ◽  
In Situ Monitoring ◽  
Circuit Board ◽  
Center Frequency ◽  
Practical Implementation ◽  
Differential Mode ◽  
Frequency Monitoring ◽  
Continuous Feedback

In the present work, a practical method to integrate sensing mechanisms into widely tunable evanescent-mode cavity resonators for tracking the center frequency is introduced. This mechanism allows for in-situ monitoring and outputs a signal that can be used to generate a closed loop feedback that can be used to lock in the center frequency of the resonator. The major benefit of this mechanism is that the performance of a resonator is not sacrificed since the higher order differential mode used for monitoring is orthogonal to the fundamental mode of the resonator. The resonator is created inside a standard printed circuit board using 3-dimensional laser patterning to allow the existence of the differential mode. An example resonator is fabricated to demonstrate the concept and tuned from 3.62 to 6.85 GHz. The differential mode was monitored to be at a frequency 1.8 times higher than the common mode. The unloaded quality factor of the resonator is extracted from measurements to verify that the sensing mechanism does not induce any additional losses. Continuous feedback is a crucial step towards a robust fielded widely tunable filter.

Compact dual mode X-band SIW bandpass filter with wide spurious suppression using split square ring slot resonator

Circuit World ◽  
2020 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Sandhya Ramalingam ◽  
Umma Habiba Hyder Ali ◽  
Sharmeela Chenniappan
Keyword(s):  
Bandpass Filter ◽  
Equivalent Circuit Model ◽  
Circuit Board ◽  
Center Frequency ◽  
Design System ◽  
Dual Mode ◽  
Content Type ◽  
X Band ◽  
Compact Size ◽  
Spurious Suppression

Purpose This paper aims to design a dual mode X-band substrate integrated waveguide (SIW) bandpass filter in the conventional SIW structure. A pair of back-to-back square and split ring resonator is introduced in the single-layer SIW bandpass filter. The various coupling configurations of SIW bandpass filter using split square ring slot resonator is designed to obtain dual resonant mode in the passband. It is shown that the measured results agree with the simulated results to meet compact size, lower the transmission coefficient, better reflection coefficient, sharp sideband rejection and minimal group delay. Design/methodology/approach A spurious suppression of wideband response is suppressed using an open stub in the transmission line. The width and length of the stub are tuned to suppress the wideband spurs in the stopband. The measured 3 dB bandwidth is from 8.76 to 14.24 GHz with a fractional bandwidth of 48.04% at a center frequency of 11.63 GHz, 12.59 GHz. The structure is analyzed using the equivalent circuit model, and the simulated analysis is based on an advanced design system software. Findings This paper discusses the characteristics of resonator below the waveguide cut-off frequency with their working principles and applications. Considering the difficulties in combining the resonators with a metallic waveguide, a new guided wave structure – the SIW is designed, which is synthesized on a planar substrate with linear periodic arrays of metallized via based on the printed circuit board. Originality/value This study has investigated the wave propagation problem of the SIW loaded by square ring slot-loaded resonator. The electric dipole nature of the resonator has been used to achieve a forward passband in a waveguide environment. The proposed filters have numerous advantages such as high-quality factor, low insertion loss, easy to integrate with the other planar circuits and, most importantly, compact size.

scholarly journals Ultra-compact capacitively loaded evanescent half-mode SIW filters for LTE applications

2014 ◽  
Vol 6 (5) ◽  
pp. 487-490 ◽  
Author(s):  
Tinus Stander ◽  
Saurabh Sinha
Keyword(s):  
Printed Circuit Board ◽  
Circuit Board ◽  
Center Frequency ◽  
Fractional Bandwidth ◽  
Third Order ◽  
Printed Circuit ◽  
Term Evolution ◽  
Waveguide Filter ◽  
Capacitive Loading

This paper presents a novel miniaturized substrate integrated waveguide filter by combining both half-mode resonators and capacitive loading on a conventional two-layer printed circuit board (PCB) process. The resulting synthesis is successfully demonstrated in an long-term evolution application by means of a third-order filter of <225 mm2in size while featuring 2.3 dB insertion loss over a 5.5% fractional bandwidth at 3.7 GHz. Good first-iteration agreement between simulated and measured results, both in center frequency and bandwidth, are achieved.

Equivalent model of circular-type spiral inductor in printed circuit board

2012 ◽  
Vol 55 (2) ◽  
pp. 337-340 ◽  
Author(s):  
Tong-Ho Chung ◽  
Hee-Do Kang ◽  
Tae-Lim Song ◽  
Jong-Gwan Yook
Keyword(s):  
Printed Circuit Board ◽  
Circuit Board ◽  
Equivalent Model ◽  
Spiral Inductor ◽  
Printed Circuit

scholarly journals Perancangan Quadband BPF dengan Komponen Lumpeduntuk Sistem m-BWA

2016 ◽  
Vol 13 (2) ◽  
pp. 47
Author(s):  
Gunawan Wibisono ◽  
Daniel Simanjuntak ◽  
Taufiq Alif Kurniawan
Keyword(s):  
Return Loss ◽  
Printed Circuit Board ◽  
Group Delay ◽  
Bandpass Filter ◽  
Circuit Board ◽  
Design System ◽  
Broadband Wireless ◽  
Printed Circuit ◽  
Advance Design System ◽  
Mobile Broadband Wireless Access

Ada banyak teknologi mobile broadband wireless access (m-BWA) yang saat ini digunakan, agar bisa mencakup seluruh teknologi m-BWA yang ada dalam sebuah perangkat maka diperlukan teknologi multiband . Salah satu komponen penting yang mendukung perkembangan teknologi m-BWA adalah bandpass filter (BPF), yang berfungsi untuk memilah-milah dan mengisolasi band yang spesifik dari interferensi pada transceiver radio frequency (RF). Pada penelitian ini akan dirancang quadband BPF yang beroperasi pada frekuensi tengah 950 MHz dan 1,85 GHz untuk aplikasi GSM, 2,35 GHz untuk aplikasi WiMAX, dan 2,65 GHz untuk aplikasi LTE secara simultan. Rangkaian quadband BPF dibangun dan dikembangkan dari konsep dualband BPF dengan menambahkan sejumlah cross coupling pada inductive coupling BPF tersebut untuk menghasilkan zero pada frekuensi tertentu yang diharapkan menggunakan komponen lumped. BPF yang dirancang memiliki spesifikasi, input return loss (S11) < -10 dB, insertion loss (S21) > -3 dB, dan voltage standing wave ratio (VSWR) antara 1 – 2, dan group delay kurang dari 10 ns. Perancangan dilakukan menggunakan perangkat lunak Advance Design System (ADS) dan kemudian difabrikasi berbasis printed circuit board (PCB). Hasil simulasi BPF menunjukkan kinerja quadband BPF memenuhi kriteria perancangan sedangkan hasil fabrikasi mengalami pergeseran.

scholarly journals A New Reconfigurable Filter Based on a Single Electromagnetic Bandgap Honey Comb Geometry Cell

Electronics ◽  
2021 ◽  
Vol 10 (19) ◽  
pp. 2390
Author(s):  
Andre Tavora de Albuquerque Silva ◽  
Claudio Ferreira Dias ◽  
Eduardo Rodrigues de Lima ◽  
Gustavo Fraidenraich ◽  
Larissa Medeiros de Almeida
Keyword(s):  
Communication Systems ◽  
Printed Circuit Board ◽  
Unit Cell ◽  
Circuit Board ◽  
Center Frequency ◽  
Electromagnetic Bandgap ◽  
Printed Circuit ◽  
Varactor Diodes ◽  
Intelligent Communication ◽  
Rejection Band

This work presents a new unit cell electromagnetic bandgap (EBG) design based on HoneyComb geometry (HCPBG). The new HCPBG takes a uniplanar geometry (UCPBG—uniplanar compact PBG) as a reference and follows similar design methods for defining geometric parameters. The new structure’s advantages consist of reduced occupied printed circuit board area and flexible rejection band properties. In addition, rotation and slight geometry modification in the HCPBG cell allow changing the profile of the attenuation frequency range. This paper also presents a reconfigurable unit cell HCPBG filter strategy, for which the resonance center frequency is shifted by changing the gap capacitance with the assistance of varactor diodes. The HCPBG filter and reconfiguration behavior is demonstrated through electromagnetic (EM) simulations over the FR1 band of the 5G communication network. Intelligent communication systems can use the reconfiguration feature to select the optimal operating frequency for maximum attenuation of unwanted or interfering signals, such as harmonics or intermodulation products.

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