scholarly journals Design of compact multi-mode microstrip resonator filters for dual-band application

2019 ◽  
Vol 13 (2) ◽  
pp. 696
Author(s):  
Nurshamimi Rosli ◽  
Siti Aminah Md Akhir ◽  
Siti Zuraidah Ibrahim ◽  
Nur Baya Mohd Hashim ◽  
Nurehansafwanah Khalid
Keyword(s):  
Resonant Frequency ◽  
Fundamental Frequency ◽  
Mode Frequency ◽  
Dual Band ◽  
Design System ◽  
Network Analyzer ◽  
Dual Mode ◽  
Microstrip Resonator ◽  
Multi Mode ◽  
Resonator Filters

<span>This paper presents the design of compact multi-mode microstrip resonator filters for dual-band application. The design is simulated using Advanced Design System (ADS) 2016 software. The benefit of the proposed filter is found to have a dual-mode frequency, where the odd-mode resonant frequency is the fundamental frequency represented by the length of the resonator while the even-mode resonant frequency is represented by the length of the stub. To validate the design, a prototype is fabricated on Rogers RO4003C substrate and measured using PNA Network Analyzer.</span>

scholarly journals Miniaturized Dual-Band Dual-Mode Microstrip Patch Antenna with Defected Ground Structure for Wearable Applications

2021 ◽  
Vol 2 (2) ◽  
Author(s):  
Nur Azura Shamsudin ◽  
◽  
Shaharil Mohd Shah ◽  
Keyword(s):  
Resonant Frequency ◽  
Radiation Pattern ◽  
Human Tissue ◽  
Patch Antenna ◽  
Microstrip Patch Antenna ◽  
Dual Band ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
Dual Mode ◽  
Microstrip Patch

This work presents the performance of a miniaturized dual-band dual-mode microstrip patch antenna with Defected Ground Structure (DGS) at 2.45 GHz and 5.8 GHz on the stacked substrate configuration in the order of FR-4 – PDMS- FR-4. The antenna offers a promising solution for wearable applications in the ISM bands. The first substrate is a flexible Flame Retardant 4 (FR-4) and the other substrate is a highly flexible Polydimethyl Siloxane (PDMS). The size of the antenna was reduced from 50 × 50 mm2 to 30 × 30 mm2, by introducing DGS on the ground plane. A single U-slot on the rectangular radiating patch was introduced to produce the upper resonant frequency of 5.8 GHz while the existing square patch is to generate the lower resonant frequency of 2.45 GHz. The simulations on the dual-band dual-mode microstrip patch antenna shows the reflection coefficient, S11 at 2.45 GHz is -17.848 dB with a bandwidth of 278.8 MHz and -13.779 dB with a bandwidth of 273 MHz at 5.8 GHz. A unidirectional radiation pattern observed in the E-plane shows that the antenna could be applied for off-body communication while an omnidirectional radiation pattern in the H-plane showed that the antenna can be used for on-body communication. Bending investigation were performed for the antenna over a vacuum cylinder with varying diameters of 50 mm, 60 mm, 70 mm, 80 mm, 90 mm, 100 mm and 120 mm in the CST MWS® software. From the graph of reflection coefficients, the performance of the antenna were not affected in bending condition. The SAR simulations showed that the SAR limits obey the guidelines as stipulated by the Federal Communication Commission (FCC) and the International Commission on Non-Ionizing Radiation Protection (ICNIRP) for 1 mW of input power. The 2.45 GHz SAR limit for 1 g of human tissue is 0.09007 W/kg (FCC standard: < 1.6 W/kg) while for 10 g is 0.01867 W/kg (ICNIRP standard: < 2 W/kg). For 5.8 GHz, the SAR limit for 1 g of human tissue is 0.115 W/kg and for 10 g is 0.03517 W/kg. Based on the performance of the antenna in bending condition and the SAR limits, it is safe to conclude that the antenna can be used for wearable applications at 2.45 GHz and 5.8 GHz of the ISM bands.

A Concurrent Dual-Band and Dual-Mode Frequency Synthesizer for Radar Systems

2018 ◽  
Vol 26 (5) ◽  
pp. 945-957
Author(s):  
Yu-Kai Tsai ◽  
Yi-Keng Hsieh ◽  
Hung-Yu Tsai ◽  
Huan-Sheng Chen ◽  
Liang-Hung Lu
Keyword(s):  
Frequency Synthesizer ◽  
Mode Frequency ◽  
Dual Band ◽  
Dual Mode ◽  
Radar Systems

scholarly journals A Novel Dual-Mode Dual-Band Bandpass Filter Based on a Single Ring Resonator

2020 ◽  
Vol 20 (2) ◽  
pp. 91-95
Author(s):  
Youngje Sung
Keyword(s):  
Resonant Frequency ◽  
Circular Hole ◽  
Bandpass Filter ◽  
Ring Resonator ◽  
Dual Band ◽  
Mode Structure ◽  
Dual Mode ◽  
Band Filter ◽  
Single Ring ◽  
Mode Characteristic

In this paper, a dual-mode bandpass filter that operates in two different bands is proposed. A circular patch with a small circular hole is set as the basic resonator, and, as the circular hole moves, the linewidth of the ring resonator becomes non-uniform. Consequently, the ring resonator is structurally asymmetric and exhibits a dual-mode characteristic. A gap is formed in the middle of the resonator, a pair of inductors and capacitors is applied to the gap, and the proposed dual-mode structure operates as a dual-band filter. The first resonant frequency <i>f</i><sub>1</sub> is determined by the inductor and capacitor values, and the second resonant frequency <i>f</i><sub>2</sub> is determined by the capacitor values. In addition, the frequency ratio (<i>f</i><sub>2</sub>/<i>f</i><sub>1</sub>) can be adjusted by an appropriate combination of inductor and capacitor values.

scholarly journals Miniaturized Dual-Band Bandpass Filter Using Multilayered Dual-Mode Resonator

2018 ◽  
Vol 11 (1) ◽  
Author(s):  
Raaed T. Hammed ◽  
Dhuha G. Hammood
Keyword(s):  
Bandpass Filter ◽  
Dual Band ◽  
Design System ◽  
Dual Mode ◽  
Wireless System ◽  
Capacitively Coupled ◽  
Transmission Zeros ◽  
Quarter Wavelength ◽  
Via Hole ◽  
Mode Resonator

This paper presents a miniaturized dual-band bandpass filter using two coupled dual-moderesonators (DMRs). The dual-mode resonator is a short-circuited stub loaded square loop resonator. The concept of miniaturization achieved using multilayered technology. Therefore, the filter circuits are achieved in three layers. On the first layer, two coupled dual-mode resonators are designed and shorted to a ground layer to specify the required passbands. Next, a second layer employs two shorted quarter wavelength stubs coupled through one via hole are capacitively coupled to the first layer circuit to achieve the filtering response. For our demonstration, a multi-band bandpass filter is designed to serve a multifunctional wireless system has centre frequencies of 1.9 GHz GSM and 3.5 GHz WiMax systems. The filter is implemented and simulated using the momentum simulator of the Advanced Design System (ADS) software package. The filter response has two second-order passbands with four transmission zeros leads to a high skirt selectivity. The filter circuit area is very small, less than 37 mm2 terminating the feeding ports.

3-D Printed Dual-Band Filter Based on Spherical Dual-Mode Cavity

2021 ◽  
pp. 1-1
Author(s):  
Yuan Chen ◽  
Gang Zhang ◽  
Jiasheng Hong ◽  
Zhengyu Sun ◽  
Jiquan Yang ◽  
...  
Keyword(s):  
Dual Band ◽  
Dual Mode ◽  
Band Filter
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