Tuning the resonant frequency of microstrip patch antenna in LWIR

2018 ◽  
Author(s):  
Shenjie Miao ◽  
Brian A. Lail
Keyword(s):  
Resonant Frequency ◽  
Patch Antenna ◽  
Microstrip Patch Antenna ◽  
Microstrip Patch

scholarly journals Microwave Wireless Power Transfer System Based on a Frequency Reconfigurable Microstrip Patch Antenna Array

Energies ◽  
2021 ◽  
Vol 14 (2) ◽  
pp. 415
Author(s):  
Haiyue Wang ◽  
Lianwen Deng ◽  
Heng Luo ◽  
Junsa Du ◽  
Daohan Zhou ◽  
...  
Keyword(s):  
Resonant Frequency ◽  
Antenna Array ◽  
Patch Antenna ◽  
Wireless Power Transfer ◽  
Microstrip Patch Antenna ◽  
Market Demand ◽  
Power Transfer ◽  
Wireless Power ◽  
Microstrip Patch ◽  
Wide Range

The microwave wireless power transfer (MWPT) technology has found a variety of applications in consumer electronics, medical implants and sensor networks. Here, instead of a magnetic resonant coupling wireless power transfer (MRCWPT) system, a novel MWPT system based on a frequency reconfigurable (covering the S-band and C-band) microstrip patch antenna array is proposed for the first time. By switching the bias voltage-dependent capacitance value of the varactor diode between the larger main microstrip patch and the smaller side microstrip patch, the working frequency band of the MWPT system can be switched between the S-band and the C-band. Specifically, the operated frequencies of the antenna array vary continuously within a wide range from 3.41 to 3.96 GHz and 5.7 to 6.3 GHz. For the adjustable range of frequencies, the return loss of the antenna array is less than −15 dB at the resonant frequency. The gain of the frequency reconfigurable antenna array is above 6 dBi at different working frequencies. Simulation results verified by experimental results have shown that power transfer efficiency (PTE) of the MWPT system stays above 20% at different frequencies. Also, when the antenna array works at the resonant frequency of 3.64 GHz, the PTE of the MWPT system is 25%, 20.5%, and 10.3% at the distances of 20 mm, 40 mm, and 80 mm, respectively. The MWPT system can be used to power the receiver at different frequencies, which has great application prospects and market demand opportunities.

scholarly journals A Slotted Tri-Band Patch Antenna Embedded on Textured Pin Dielectric Substrate

2019 ◽  
Vol 8 (5S3) ◽  
pp. 21-22
Keyword(s):  
Resonant Frequency ◽  
Surface Waves ◽  
Patch Antenna ◽  
Dielectric Substrate ◽  
Microstrip Patch Antenna ◽  
Radiation Mechanism ◽  
Specific Location ◽  
Frequency Bands ◽  
Microstrip Patch ◽  
Periodic Arrangement

The propagation of surface waves in the microstrip patch antenna proves to be proves to serious hindrance to radiation mechanism of the antenna. The periodic arrangement of shorting pins is embedded in the dielectric substrate at specific location to enhance the gain by around 4-5dB. The slotted perturbations have been done for achieving tri-band characteristics. The antenna is suitable for operation at three resonant frequency bands centered at 2.2421 GHz, 5.7632GHz and 7.7633GHz, which makes it suitable for WLAN applications.

scholarly journals Inverted dual U slot loaded truncated microstrip patch antenna for wireless applications

2018 ◽  
Vol 7 (2.21) ◽  
pp. 151
Author(s):  
Kavitha Thandapani ◽  
Shiyamala Subramani
Keyword(s):  
Dielectric Constant ◽  
Resonant Frequency ◽  
Loss Tangent ◽  
Patch Antenna ◽  
Return Loss ◽  
Microstrip Patch Antenna ◽  
Wireless Applications ◽  
Microstrip Patch ◽  
Dielectric Constant And Loss ◽  
Circular Patch Antenna

Dual U Slot Loaded Truncated Microstrip Patch Antenna is designed for wireless applications. The proposed geometry comprised of two inverted U slots in truncated circular patch antenna operation covering 2.24 to 2.72 GHZ frequency bands are obtained. It is found that the slot and truncated is used to improve the bandwidth and return loss respectively. The resonant frequency is found to be 2.5GHZ. The bandwidth of the proposed antenna for lower and upper resonant frequency is found to be 19.2%. The proposed antenna is fed by 50Ω co-axial probe feed and simulated on Rogers RT/duroid5880 substrate.  Rogers RT/duroid 5880 substrate has dielectric constant and loss tangent of 2.2 and 0.0009 respectively. An air gap is used in this proposed design for tuning the desired frequencies and increasing the bandwidth. The antenna shows an acceptable gain of 2.1dB to 5.7dB with unidirectional pattern over the obtained frequency band. 

scholarly journals Swine Influenza Mimicked Optimization (SIMO)

2020 ◽  
Vol 9 (5) ◽  
pp. 937-943
Keyword(s):  
Resonant Frequency ◽  
Patch Antenna ◽  
Fitness Function ◽  
Swine Influenza ◽  
Microstrip Patch Antenna ◽  
Optimization Techniques ◽  
Treatment Control ◽  
Microstrip Patch ◽  
Global Optima ◽  
Dimensional Parameters

In this paper, Swine Influenza Model based Optimization (SIMBO) is modified as Swine Influenza mimicked Optimization (SIMO) and explored through the application in the antenna design. Different researchers proposed different optimization techniques and algorithms so that the accuracy of optima will be improved. For fast convergence and better accuracy SIMBO with its variants such as treatment (SIMBOT), vaccination (SIMBOV) and quarantine (SIMBOQ). We have modified Swine Influenza model to propose new technique known as SIMO. In SIMO, health of individuals is improved by synchronizing vaccination, quarantine and treatment. Test 1 and Test 2 are used before vaccine and quarantine respectively to adjust antiviral dose dynamically during its treatment. The additional feature in SIMO such as infection factor control and improve the health of individuals gradually without checking the state/health at every day. SIMO changes solution indirectly during treatment and directly via vaccination and quarantine. The time varying treatment control the health of individuals in defined days such that individual will not feel illness for longer duration. An available closed form formula of equilateral triangular microstrip patch antenna resonant frequency has been used to form the fitness function in order to optimize the dimensional parameters. The proposed technique is used to determine the accurate resonant frequency of equilateral triangular microstrip patch antenna of different dimension. In order to optimize the technique with speedy convergence and effective precision of global optima, this method also used for the optimization of standard benchmark functions.

Ka-Band Radiation Pattern Reconfigurable Microstrip Patch Antenna Employing MEMS Switches

2013 ◽  
Vol 411-414 ◽  
pp. 1674-1679 ◽  
Author(s):  
Zhong Liang Deng ◽  
Hua Gong ◽  
Sen Fan ◽  
Cai Hu Chen
Keyword(s):  
Resonant Frequency ◽  
Radiation Pattern ◽  
Insertion Loss ◽  
Patch Antenna ◽  
Rf Mems ◽  
Microstrip Patch Antenna ◽  
Mems Switches ◽  
Monolithically Integrated ◽  
Microstrip Patch ◽  
Rf Mems Switches

This article describes the design of a microstrip patch antenna with radiation pattern reconfigurable characteristic, where two monolithically integrated MEMS switches are utilized. By changing the physical dimension of the antenna, its radiation pattern could be changed. Moreover, we present detailed structures of these RF MEMS switches, whose isolation and insertion loss are-23.12 dB and-0.09 dB at operating frequency, respectively. And the resonant frequency of the antenna is 35.4 GHz and the bandwidth is 6.69%. All the results are simulated.

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