Computation of resonant frequency of annular microstrip antenna loaded with multiple shorting posts

Mahajan, Madhurika; Khah, Sunil Kumar; Chakarvarty, T.; Де, Асок

doi:10.1049/iet-map:20070057

Cited by 9 publications

(5 citation statements)

References 15 publications

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“…In this case, the resistor loading has maximum effects on the resonant-frequency lowering due to the surface current has a maximum value around the inner edge of the patch, however, the matching level is poor. With consideration of the symmetrical characteristics [ 23 ] and easy of fabrication, the loading point was placed at the outer edge of the patch with x R = 16.5 mm.…”

Section: Resultsmentioning

confidence: 99%

A Compact Annular Ring Microstrip Antenna for WSN Applications

Wang

Liang

Zhou

et al. 2012

Sensors

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A compact annular ring microstrip antenna was proposed for a wireless sensor network (WSN) application in the 2.4 GHz band. In this paper the major considerations of the conformal antenna design were the compact size and the impact on antenna's performance of a steel installation base. By using a chip resistor of large resistance (120 Ω) the antenna size was reduced to 38% of that a conventional annular ring patch antenna. With the addition of the steel installation base the resonant frequency of the antenna increases about 4.2% and the bandwidth reduces from 17.5% to 11.7% by adjusting the load resistance simultaneously. Several key parameters were discussed and optimized, and the antenna was fabricated and its performance measured. The antenna is well matched at 2.4 GHz with 34.2 dB return loss and –2.5 dBi peak gain. Meanwhile, it exhibits excellent radiation patterns with very low cross-polarization levels.

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Section: Resultsmentioning

confidence: 99%

A Compact Annular Ring Microstrip Antenna for WSN Applications

Wang

Liang

Zhou

et al. 2012

Sensors

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“…The antenna is printed on a glass epoxy (FR-4) substrate of height 1.6 mm, relative permittivity 4.3, and loss tangent 0.025. Following [15][16][17][18], the antenna structure was designed for simulation. The final dimensions of the proposed antenna were obtained by optimizations with the parameters for the best results.…”

Section: Antenna Designmentioning

confidence: 99%

Shared Aperture Microstrip Patch Antenna Array for L and S-Bands

Dhiman¹,

Sharma²,

Khah³

2019

PIER Letters

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A dual mode shared aperture antenna consisting of two planer arrays of ring antennas is designed for L and S bands. The array of larger dimension surrounds the array of smaller dimension. The antennas are isolated from one another and fed separately. The antenna dimensions are optimized and prototyped. The antennas radiate separately in L and S bands with least coupling or no coupling. Measured results are in agreement with the simulations, depicting good performance in terms of impedance bandwidth, isolation, and gain.

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“…The resonant frequency for a given mode of an annular ring antenna loaded with symmetric posts is presented in [17], the resonant frequency is calculated as…”

Section: Theoretical Analysismentioning

confidence: 99%

“…From various equations given in [17] and Eq. (3), relation between the various constants is evaluated given by .…”

Section: Theoretical Analysismentioning

confidence: 99%

Extended Cavity Model for Input Impedance of Annular Microstrip Antenna Loaded with Multiple Shorting Posts

Mahajan

Chakarvarty

Khah

et al. 2008

Journal of Electromagnetic Waves and Applications

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A new method for impedance of an annular patch loaded by multiple posts is presented using extended cavity model. The post is loaded away from the centre of the ring. The input impedance for dominant mode is calculated with this method and compared with the measured and simulated results. For the simulation IE3D software is used based on method of moment. Downloaded by [Michigan State University] at 09:57 26 December 2014 1334 Mahajan et al.

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Computation of resonant frequency of annular microstrip antenna loaded with multiple shorting posts

Cited by 9 publications

References 15 publications

A Compact Annular Ring Microstrip Antenna for WSN Applications

A Compact Annular Ring Microstrip Antenna for WSN Applications

Shared Aperture Microstrip Patch Antenna Array for L and S-Bands

Extended Cavity Model for Input Impedance of Annular Microstrip Antenna Loaded with Multiple Shorting Posts

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