scholarly journals Design and Synthesis of Multi-Mode Bandpass Filter for Wireless Applications

Electronics ◽  
2021 ◽  
Vol 10 (22) ◽  
pp. 2853
Author(s):  
Satheeshkumar Palanisamy ◽  
Balakumaran Thangaraju ◽  
Osamah Ibrahim Khalaf ◽  
Youseef Alotaibi ◽  
Saleh Alghamdi
Keyword(s):  
Quality Factor ◽  
Bandpass Filter ◽  
Center Frequency ◽  
Impedance Bandwidth ◽  
Band Pass Filter ◽  
Pass Filter ◽  
Coaxial Cavity ◽  
Wireless Applications ◽  
Design And Synthesis ◽  
Band Pass

In this paper, a compact bandpass filter with improved band stop and band pass characteristics for wireless applications is built with four internal conductive poles in a single resonating cavity, which adds novel quad-resonating modes to the realization of band pass filter. This paper covers the design and testing of the S-band combline coaxial cavity filter which is beneficial in efficient filtering functions in wireless communication system design. The metallic cavity high Q coaxial resonators have the advantages of narrowband, low loss, better selectivity and high potential for power handling, as compared to microstrip filter in the application to determine the quality factor of motor oils. Furthermore, the tuning of coupling screws in the combline filter allows in frequency and bandwidth adjustments. An impedance bandwidth of 500 MHz (fractional bandwidth of 12.8%) has been achieved with an insertion loss of less than 2.5 dB and return loss of 18 dB at the resonant frequency. Four-pole resonating cavity filters have been developed with the center frequency of 4.5 GHz. Insert loss at 0 dB and estimated bandwidth at 850 MHz and a quality factor of 4.3 for the band pass frequencies between 4 and 8 GHz is seen in the simulated result.

scholarly journals Enhanced Bandwidth of Band Pass Filter Using a Defected Microstrip Structure for Wideband Applications

2018 ◽  
Vol 8 (6) ◽  
pp. 5260 ◽  
Author(s):  
Sanae Azizi ◽  
Mustapha El Halaoui ◽  
Abdelmoumen Kaabal ◽  
Saida Ahyoud ◽  
Adel Asselman
Keyword(s):  
Bandpass Filter ◽  
Dielectric Substrate ◽  
Center Frequency ◽  
Band Pass Filter ◽  
Pass Filter ◽  
Bandwidth Enhancement ◽  
Wireless Applications ◽  
Coupled Lines ◽  
Band Pass ◽  
Microstrip Structure

<p>In this paper, the bandwidth enhancement of bandpass filter (BPF) is proposed by utilizing defected microstrip structure (DMS). The initial micro strip BPF which is designed to have the bandwidth 1GHz with the center frequency of 3.5GHz is deployed on FR4 Epoxy dielectric substrate with overall size and thickness of 14mm x 24mm and 1.6mm, respectively. The proposed filter consists of two parallel coupled lines centred by ring-shaped, to enhance the bandwidth response, an attempt is carried out by applying DMS on the ligne center with a ring-shaped of initial filter. Here, the proposed DMS is constructed of the arrowhead dumbbell. Some parametrical studies to the DMS such as changing to obtain the optimum geometry of DMS with the desired bandwidth response. From the characterization result, it shows that the utilization of DMS on to the microstrip ligne of filter has widened 3dB bandwidth response up to 1.8GHz ranges from 2.55GHz to 4.35GHz yielding an enhanced wideband response for various wideband wireless applications.</p>

Reconfigurable dual-mode band-pass filter with switchable bandwidth using PIN diodes

2014 ◽  
Vol 7 (6) ◽  
pp. 655-660 ◽  
Author(s):  
Photos Vryonides ◽  
Symeon Nikolaou ◽  
Sangkil Kim ◽  
Manos M. Tentzeris
Keyword(s):  
Insertion Loss ◽  
Center Frequency ◽  
Band Pass Filter ◽  
Dual Mode ◽  
Pin Diodes ◽  
Pass Filter ◽  
Physical Size ◽  
Wireless Applications ◽  
Band Pass ◽  
Dc Bias

A reconfigurable band-pass filter with switchable bandwidth, for wireless applications is demonstrated using a dual-mode microstrip square-loop resonator. The proposed filter has been designed on Rogers RO4003C and achieves switchable bandwidth by changing the length of two tuning stubs with the implementation of two strategically placed p-i-n diodes as switching elements. The filter was designed with a center frequency of 2.4 GHz and the two distinct operation states have bandwidths, 113 MHz (4.8%) with an insertion loss of 1.2 dB and 35 MHz (1.5%) with an insertion loss of 1.5 dB. The physical size of the fabricated reconfigurable filter including the implementation of the DC bias lines is comparable to the size of a conventional filter.

An Enhanced Design of Multi-Band RF Band Pass Filter Based on Tunable High-Q Active Inductor for Nano-Satellite Applications

2016 ◽  
Vol 26 (04) ◽  
pp. 1750055 ◽  
Author(s):  
Aymen Ben Hammadi ◽  
Mongia Mhiri ◽  
Fayrouz Haddad ◽  
Sehmi Saad ◽  
Kamel Besbes
Keyword(s):  
Metal Oxide ◽  
Quality Factor ◽  
Metal Oxide Semiconductor ◽  
Oxide Semiconductor ◽  
Center Frequency ◽  
Active Inductor ◽  
Band Pass Filter ◽  
Pass Filter ◽  
Band Pass ◽  
Multi Band

This paper describes the design of a novel cascode-grounded tunable active inductor and its application in an active band-pass filter (BPF) suitable for multi-band radio frequency (RF) front-end circuits. The proposed active inductor circuit uses feedback resistance to improve the equivalent inductance and the quality factor. The novelty of this work lies on the use of a few number of multi-finger transistors, which allows reducing strongly the power consumption and the silicon area. In other words, we demonstrate that the use of variable P-type Metal-Oxide-Semiconductor (PMOS) resistor and controllable current source have a good potential for wide tuning in terms of inductance value, quality factor and frequency operation. The RF BPF is realized using the proposed active inductor with suitable input and output buffer stages. The tuning of the center frequency for multi-band operation is achieved through control voltages. The designed active inductor and RF BPF have been implemented in a standard 0.13[Formula: see text][Formula: see text]m Complementary Metal Oxide Semiconductor (CMOS) technology. The simulation results are compared between schematic and post-layout design for inductance value, quality factor, transmission coefficient S21 and noise. This design yields encouraging results: the inductance value can be tuned from 10.94 to 44.17[Formula: see text]nH with an optimal quality factor around 2,581. In addition, the center frequency of the BPF can be tuned between 2 and 4.84[Formula: see text]GHz with an average insertion loss of [Formula: see text][Formula: see text]dB. Throughout this range, the noise figure is between 10.49 and 9.22[Formula: see text]dB with an input referred 1[Formula: see text]dB compression point of [Formula: see text][Formula: see text]dBm and IIP3 of 7.36[Formula: see text]dBm. The filter occupies 25.43[Formula: see text][Formula: see text]m of active area without pads and consumes between 2.38 and 2.84[Formula: see text]mW from a 1[Formula: see text]V supplying voltage.

scholarly journals Design and Realization of a Compact High-Frequency Band-Pass Filter with Low Insertion Loss Based on a Combination of a Circular-Shaped Spiral Inductor, Spiral Capacitor and Interdigital Capacitor

Electronics ◽  
2018 ◽  
Vol 7 (9) ◽  
pp. 195 ◽  
Author(s):  
Ki-Hun Lee ◽  
Eun-Seong Kim ◽  
Jun-Ge Liang ◽  
Nam-Young Kim
Keyword(s):  
Insertion Loss ◽  
Return Loss ◽  
Bandpass Filter ◽  
Center Frequency ◽  
Spiral Inductor ◽  
Band Pass Filter ◽  
Pass Filter ◽  
Interdigital Capacitor ◽  
In Series ◽  
Band Pass

In this study, the proposed bandpass filter (BPF) connects an interdigital and a spiral capacitor in series between the two symmetrical halves of a circular intertwined spiral inductor. For the mass production of devices and to achieve a higher accuracy and a better performance compared with other passive technologies, we used integrated passive device (IPD) technology. IPD has been widely used to realize compact BPFs and achieve the abovementioned. The center frequency of the proposed BPF is 1.96 GHz, and the return loss, insertion loss and transmission zero are 26.77 dB, 0.27 dB and 38.12 dB, respectively. The overall dimensions of BPFs manufactured using IPD technology are 984 × 800 μ m 2 , which is advantageous for miniaturization and integration.

scholarly journals CPW based Band Pass Filter Using DGS for ISM Band Applications

2018 ◽  
Vol 7 (3.34) ◽  
pp. 421
Author(s):  
Mrs. S. Jalaja ◽  
Dr V. Prithivirajan ◽  
K Gajalakshimi ◽  
S Chitra ◽  
R Nithya
Keyword(s):  
Bandpass Filter ◽  
Coplanar Waveguide ◽  
Center Frequency ◽  
Band Pass Filter ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
Pass Filter ◽  
Ism Band ◽  
Band Pass ◽  
Filtering Effect

The design and simulation of coplanar waveguide (CPW) bandpass filter (BPF) has been described in this paper. It mainly focuses on Defected Ground Structure (DGS), where U-shaped DGS with open stub in transmission line has been introduced. By etching the DGS pattern in ground and transmission will change the distribution of inductance and capacitance to produce filtering effect. This paper also discusses about the influence of geometrical parameter l for the improvement in the frequency response of bandpass filter. As increasing the dimension of the geometric parameter l shift the center frequency to the higher frequencies. This filter offers a bandwidth of 1.65 GHz with passband ranging from 2.1 GHz to 3.75 GHz with a stopband rejection is about -28 dB.  

A NEW SWITCHED OPAMP APPROACH FOR IMPROVING THE OPERATION OF AUTO-RESET SWITCHED-CAPACITOR FILTERS

2011 ◽  
Vol 20 (05) ◽  
pp. 835-848 ◽  
Author(s):  
MOHAMMAD RASHTIAN ◽  
OMID HASHEMIPOUR ◽  
KEIVAN NAVI ◽  
ALI JALALI
Keyword(s):  
Power Consumption ◽  
Quality Factor ◽  
Second Order ◽  
Considerable Reduction ◽  
Center Frequency ◽  
Switched Capacitor ◽  
Band Pass Filter ◽  
Pass Filter ◽  
Band Pass ◽  
Switched Capacitor Filters

In this paper, a new switched opamp is presented in order to improve the operation of auto-zeroed switched capacitor circuit. This approach results in a considerable reduction in power consumption and a moderate speed improvement. Based on the above improvement, a second-order band-pass filter with a center frequency of 833 kHz and quality factor of 8 is realized and compared with previous works. The proposed switched opamp is also utilized in the structure of a novel z to -z2 block for the design of pseudo two-path band-pass filters. A second-order pseudo two-path band-pass filter with the same specification of the previous work is designed, simulated, and compared.

A Reduced-Size Microstrip Four Poles Hairpin Band-Pass Filter with Multilayer Parallel-Coupled Line for Satellite Broadcasting

2020 ◽  
Author(s):  
Qazwan Abdullah Tarbosh ◽  
Nor Shahida Mohd Shah ◽  
Bishwajeet Pandey ◽  
Adeeb Salh ◽  
Nabil Farah ◽  
...  
Keyword(s):  
Reflection Coefficient ◽  
Bandpass Filter ◽  
Filter Design ◽  
Center Frequency ◽  
Design System ◽  
Band Pass Filter ◽  
Coupled Line ◽  
Pass Filter ◽  
Satellite Broadcasting ◽  
Band Pass

Recently, a multilayer structure is very imperative to minimize the size of planar microstrip filters. In the flexible design and incorporation of other microwave components, a multilayer band-pass filter provides another dimension. This paper, therefore, introduces a band-pass filter of 2.52-2.65 GHz for digital broadcast applications using parallel-coupled line (PCL) and multilayer(ML) hairpin resonator. The targeted four-pole resonator has a center frequency of 2.58 GHz with a bandwidth of 130 MHz. The hairpin-line offers compact filter design structures. The proposed configuration of the parallel-coupled line (PCL) resonator is used to design the ML band-pass filter. The FR4 substrate with a dielectric constant (&epsilon;r) of 4.3 and 1.6 mm thickness was used. Comparison analysis between the simulated insertion loss and the reflection coefficient of substrates RO3003 and FR4 was performed to verify the efficiency of the proposed filter design. Simulation of PCL filter is accomplished using computer simulation technology (CST)and an advanced design system(ADS). The PCL bandpass filter was experimentally validated and good agreement between simulation and measured results were achieved showing a well-measured reflection coefficient. The simulated results of the ML bandpass filter show that the circuit performs well, and the filter size is significantly reduced.

Envelope Analysis Based on the Combination of Morlet Wavelet and Kurtogram

2012 ◽  
Vol 490-495 ◽  
pp. 305-308
Author(s):  
Yu Liang ◽  
Yu Guo ◽  
Chuan Hui Wu ◽  
Yan Gao
Keyword(s):  
Frequency Band ◽  
Filter Banks ◽  
Morlet Wavelet ◽  
Center Frequency ◽  
Band Pass Filter ◽  
Pass Filter ◽  
Filter Bandwidth ◽  
Envelope Analysis ◽  
Band Pass ◽  
Complex Morlet Wavelet

Envelope analysis based on the combination of complex Morlet wavelet and Kurtogram have advantages of automatic calculation of the center frequency and bandwidth of required band-pass filter. However, there are some drawbacks in the traditional algorithm, which include that the filter bandwidth is not -3dB bandwidth and the analysis frequency band covered by the filter-banks are inconsistent at different levels. A new algorithm is introduced in this paper. Through it, both optimal center frequency and bandwidth of band-pass filter in the envelop analysis can be obtained adaptively. Meanwhile, it ensures that the filters in the filter-banks are overlapped at the point of -3dB bandwidth and the consistency of frequency band that the filter-banks covered.

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