Dual-Mode Filter with High Design Flexibility Using Short-Loaded Resonator

2021 ◽  
Vol 36 (2) ◽  
pp. 199-204
Author(s):  
Zhaojun Zhu ◽  
Ke Yang ◽  
Xiufeng Ren ◽  
Lu Cao
Keyword(s):  
Dielectric Constant ◽  
High Frequency ◽  
Impedance Matching ◽  
Relative Dielectric Constant ◽  
Network Analyzer ◽  
Dual Mode ◽  
High Frequency Structure Simulator ◽  
Design Flexibility ◽  
Compact Size ◽  
Good Agreement

This work presents a series of independent bandpass filters (BPFs) based on dual-mode resonators (DMRs) with short stub-loaded. BPFs conform to the 802.11n protocol and include three passbands with center frequencies and bandwidths of 2.46 GHz, 3.55 GHz and 5.22 GHz, 130 MHz, 130 MHz and 470 MHz. Insertion loss and reflection loss are 1.5 dB, 1.6 dB and 1.3 dB, 18 dB, 20 dB, 30 dB. The filters are useful in the WLAN/WIMAX applications with compact size. According to the current distributions along the resonator, the feed-lines with high design flexibility arms were introduced in order to supply the needed external coupling for the dual-/tri passbands simultaneously, and achieve good impedance matching in each passband. Finally, by the version 15 of High Frequency Structure Simulator (HFSS), three BPFs with single, dual and triple passbands were designed on the Rogers 5880 substrate with the relative dielectric constant Ɛr = 2.2, substrate loss tanδ = 0.002, and the thickness h = 0.508 mm. The BPFs are measured by Agilent 85058E Vector Network Analyzer (VNA). The measured results have good agreement with the simulated ones.

scholarly journals A Defected Structure Shaped CPW-Fed Wideband Microstrip Antenna for Wireless Applications

2016 ◽  
Vol 2016 ◽  
pp. 1-7 ◽  
Author(s):  
Puneet Khanna ◽  
Amar Sharma ◽  
Kshitij Shinghal ◽  
Arun Kumar
Keyword(s):  
Patch Antenna ◽  
High Frequency ◽  
Microstrip Antenna ◽  
Microstrip Line ◽  
Coplanar Waveguide ◽  
Network Analyzer ◽  
Large Space ◽  
Wireless Applications ◽  
High Frequency Structure Simulator ◽  
Good Agreement

A coplanar waveguide- (CPW-) fed compact wideband defected structure shaped microstrip antenna is proposed for wireless applications. Defected structure is produced by cutting theUshape antenna in the form of two-sided T shape. The proposed antenna consists of two-sidedTshape strip as compared to usual monopole patch antenna for minimizing the height of the antenna. The large space around the radiator is fully utilized as the ground is on the same plane as of radiator. Microstrip line feed is used to excite the proposed antenna placed on an FR4 substrate (dielectric constantεr=4.4). The antenna is practically fabricated and simulated. Simulated results of the proposed antenna have been obtained by using Ansoft High-Frequency Structure Simulator (HFSS) software. These results are compared with measured results by using network analyzer. Measured result shows good agreement with the simulated results. It is observed that the proposed antenna shows a wideband from 2.96 GHz to 7.95 GHz with three bands atf1=3.23 GHz,f2=4.93 GHz, andf3=7.04 GHz.

scholarly journals Design of Circular Patch Antenna with Coplanar Waveguide Feed for LTE Application

2020 ◽  
Vol 9 (4) ◽  
pp. 1620-1622
Keyword(s):  
Patch Antenna ◽  
High Frequency ◽  
Coplanar Waveguide ◽  
Impedance Matching ◽  
Conducting Surface ◽  
Circular Patch ◽  
High Frequency Structure Simulator ◽  
Narrow Bandwidth ◽  
Compact Size ◽  
Circular Patch Antenna

In this paper, a circular patch antenna with Coplanar Waveguide (CPW) feed for LTE application is proposed. The proposed antenna design exhibits a decent impedance matching inside the LTE Bands 2.6 GHz. The planar monopole antenna with coplanar waveguide (CPW) feed has been considered here. It has greater advantage over microstrip compose feed lines, low scattering, low radiation spillage, the capacity to successfully control the trademark impedance, and the simplicity of mix. Rogers RT/duroid 5880 is used as substrate having a dielectric constant of 2.2 with a thickness of 1.6 mm and the conducting surface as copper. The proposed antenna obtains a narrow bandwidth in the frequency range of 2.6 GHz. It is suitable for LTE application because of its compact size and less cost to fabrication. The gain and efficiency of this antenna is good. The antenna is designed with the help of High Frequency Structure Simulator (HFSS) software.

Compact dual-mode microstrip bandpass filter based on slotted square patch resonator

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Karthie S. ◽  
Zuvairiya Parveen J. ◽  
Yogeshwari D. ◽  
Venkadeshwari E.
Keyword(s):  
Bandpass Filter ◽  
Filter Design ◽  
Center Frequency ◽  
Dual Mode ◽  
Content Type ◽  
Transmission Zeros ◽  
Compact Size ◽  
Mode Response ◽  
Better Than ◽  
Good Agreement

Purpose The purpose of this paper is to present the design of a compact microstrip bandpass filter (BPF) in dual-mode configuration loaded with cross-loop and square ring slots on a square patch resonator for C-band applications. Design/methodology/approach In the proposed design, the dual-mode response for the filter is realized with two transmission zeros (TZs) by the insertion of a perturbation element at the diagonal corner of the square patch resonator with orthogonal feed lines. Such TZs at the edges of the passband result in better selectivity for the proposed BPF. Moreover, the cross-loop and square ring slots are etched on a square patch resonator to obtain a miniaturized BPF. Findings The proposed dual-mode microstrip filter fabricated in RT/duroid 6010 substrate using PCB technology has a measured minimum insertion loss of 1.8 dB and return loss better than 24.5 dB with a fractional bandwidth (FBW) of 6.9%. A compact size of 7.35 × 7.35 mm2 is achieved for the slotted patch resonator-based dual-mode BPF at the center frequency of 4.76 GHz. As compared with the conventional square patch resonator, a size reduction of 61% is achieved with the proposed slotted design. The feasibility of the filter design is confirmed by the good agreement between the measured and simulated responses. The performance of the proposed filter structure is compared with other dual-mode filter works. Originality/value In the proposed work, a compact dual-mode BPF is reported with slotted structures. The conventional square patch resonator is deployed with cross-loop and square ring slots to design a dual-mode filter with a square perturbation element at its diagonal corner. The proposed filter exhibits compact size and favorable performance compared to other dual-mode filter works reported in literature. The aforementioned design of the dual-mode BPF at 4.76 GHz is suitable for applications in the lower part of the C-band.

Comb Shaped Triple Band Microstrip Antenna for Wireless Communication

2021 ◽  
Vol 9 (4) ◽  
pp. 379-382
Keyword(s):  
Dielectric Constant ◽  
Wireless Communication ◽  
High Frequency ◽  
Microstrip Antenna ◽  
Return Loss ◽  
Experimental Results ◽  
High Frequency Structure Simulator ◽  
Frequency Structure ◽  
Triple Band

A comb shaped microstrip antenna is designed by loading rectangular slots on the patch of the antenna. The antenna resonating at three different frequencies f1 = 5.35 GHz, f2 = 6.19 GHz and f3= 8.15 GHz. The designed antenna is simulated on High Frequency Structure Simulator software [HFSS] and the antenna is fabricated using substrate glass epoxy with dielectric constant 4.4 having dimension of 8x4x0.16 cms. The antenna shows good return loss, bandwidth and VSWR. Experimental results are observed using Vector Analyzer MS2037C/2.

Optimum Patch Dimension Ratio of T-Shaped Microstrip Antenna

2013 ◽  
Vol 684 ◽  
pp. 303-306
Author(s):  
Eugene Rhee ◽  
Ji Hoon Lee
Keyword(s):  
High Frequency ◽  
Microstrip Antenna ◽  
Microstrip Line ◽  
Return Loss ◽  
Impedance Matching ◽  
Feeding Method ◽  
High Frequency Structure Simulator ◽  
Feeding Methods ◽  
Coaxial Probe ◽  
Dimension Ratio

There are various feeding methods of antenna like as coaxial probe, coupling, parasitic elements, and impedance matching. This paper adopted the microstrip line method as the feeding method of the antenna. The high frequency structure simulator is used to analyze the characteristics of the T-shaped microstrip antenna with various patch dimensions. In comparison with the basic microstrip antenna, this proposed T-shaped microstrip antenna with 40.38 % of patch dimensions has the optimum characteristics of resonant frequency, return loss, and radiation pattern at 2.0 GHz band.

scholarly journals Metamaterial extended CSRR based monopole antenna for wideband applications

2017 ◽  
Vol 7 (1.1) ◽  
pp. 461 ◽  
Author(s):  
Pronami Bora ◽  
Mona Mudaliar ◽  
Yuvraj Baburao Dhanade ◽  
K Sreelakshm ◽  
Chayan Paul ◽  
...  
Keyword(s):  
Patch Antenna ◽  
High Frequency ◽  
Impedance Matching ◽  
Monopole Antenna ◽  
High Frequency Structure Simulator ◽  
Rectangular Patch ◽  
Measurement Results ◽  
Defected Ground Structures ◽  
Ground Structures ◽  
Ku Band

A metamaterial extended microstrip rectangular patch antenna with CSRR loading and defected ground structures(DGS) is proposed for wideband applications with band notching at the frequencies of KU band. The proposed antenna is designed by embedding it on Rogers RT/Duroid 5880 substrate with good impedance matching of 50 Ω at the feedline.The high frequency structure simulator (HFSS) is used to design and simulate the antennas parameters in the operating band. Measurement results confirm the antenna characteristics as predicted in the simulation with a slight shift in frequencies.

Quad Band Planar Inverted F Antenna for Smart Phone

2014 ◽  
Vol 573 ◽  
pp. 394-399
Author(s):  
R. Manikandan ◽  
P.K. Jawahar
Keyword(s):  
High Frequency ◽  
Smart Phone ◽  
Analysis And Design ◽  
High Frequency Structure Simulator ◽  
Low Profile ◽  
Resonance Frequencies ◽  
Theoretical Predictions ◽  
Communication Devices ◽  
Device Miniaturization ◽  
Good Agreement

In recent years, the demand for compact handheld communication devices has grown significantly. For device miniaturization antenna size is to be reduced. Micro strip and PIFA have been used for past few years. Since it has low profile geometry it can be embedded into devices. This project is to develop a Quad band small size Planar Inverted F Antenna (PIFA) for the operation in modern multi-band mobile transceiver system. Various techniques for analysis and design of such antenna investigated in this project. The design curve is used to design Quad band Planar inverted F Antenna to operate at the 900, 1800, 2100 and 3500 MHz bands. Since High Frequency Structure Simulator (HFSS) simulation result agrees well with the theoretical predictions, this project also designed through HFSS. An antenna designed at the four desired band and optimized to adjust the four resonance frequencies using HFSS simulation. The substrate FR4 (εr=4.4 & tanδ = 0.02) are in good agreement with the simulation result. Further bandwidth enhancements by making defects in the substrate at particular area were need of much reflection.

scholarly journals Four-State Coupled-Line Resonator for Chipless RFID Tags Application

Electronics ◽  
2019 ◽  
Vol 8 (5) ◽  
pp. 581 ◽  
Author(s):  
Wazie M. Abdulkawi ◽  
Abdel-Fattah A. Sheta
Keyword(s):  
Dielectric Constant ◽  
Radio Frequency Identification ◽  
Rfid Tags ◽  
Microstrip Resonator ◽  
Coupled Line ◽  
Chipless Rfid ◽  
Compact Size ◽  
Frequency Identification ◽  
The Cost ◽  
Good Agreement

A novel quad-state coupled-line microstrip resonator is proposed for compact chipless radio frequency identification (RFID) tags. The proposed resonator can be reconfigured to present one of four possible states: 00, 01, 10, and 11, representing, no resonance, resonance at f2, resonance at f1, and resonance at both f1 and f2, respectively. The frequency span between f2 and f1 can be easily controlled, thereby reducing the required spectrum. Moreover, the proposed technique allows the storage of a large amount of data in a compact size to reduce the cost per bit. A multi-resonator prototype consisting of six resonators is designed, analyzed, and experimentally characterized. This prototype is implemented on the RT Duroid 5880 substrate with a dielectric constant of 2.2, loss tangent of 0.0009, and thickness of 0.79 mm. The designed configuration can be reconfigured for 46 codes. Two complete the RFID tags, including the six resonators and two orthogonally polarized transmitting and receiving antennas, are implemented and tested. The first tag code is designed for all ones, 111111111111, and the second tag is designed as 101010101010 code. Experimental results show good agreement with the simulation.

scholarly journals Low Profile Wideband Dual-Ring Slot Antenna for Biomedical Applications

2021 ◽  
Vol 19 ◽  
pp. 38-44
Author(s):  
Shilpee Patil ◽  
Vinod Kapse ◽  
Shruti Sharma ◽  
Anil Kumar Pandey
Keyword(s):  
High Frequency ◽  
Biomedical Applications ◽  
Return Loss ◽  
Impedance Matching ◽  
Slot Antenna ◽  
Great Flexibility ◽  
High Frequency Structure Simulator ◽  
Large Bandwidth ◽  
Low Profile ◽  
Dual Ring

In this study, a low-profile, co-planar waveguide (CPW) fed, wideband, and dual-ring slot antenna design for biomedical applications is proposed. The proposed antenna has a total area of 10 mm × 10 mm and a height of 0.4 mm, and is designed by using a thin and biocompatible FR4 epoxy (εr = 4.4) substrate to accomplish human body isolation and great flexibility obtained by implantation. This wideband antenna covers a large bandwidth of industrial scientific and medical (ISM) frequency band, including 902.8 MHz to 928 MHz, 1.395 GHz to 1.4 GHz, 1.427 GHz to 1.432 GHz, 2.4 GHz to 2.485 GHz, and above. The simulation results of return loss, voltage standing wave ratio (VSWR), impedance matching, gain, and radiation pattern of the proposed antenna are obtained through High Frequency Structure Simulator (HFSS) 14 software.

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