Tuneable and dual-band circular microstrip antenna with stubs

Ray, K. P.; Kumar, Girish

doi:10.1109/8.876321

Cited by 42 publications

(10 citation statements)

References 5 publications

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“…Thus, with a directional coupler or a circulator the Tx / Rx-separation is limited to the antenna's return loss. A tunable antenna [1] might bring an improvement, but a further degradation of performance can be expected from the imperfect coupler or circulator. Typically, only a Tx / Rx-separation of α < 20 dB can be achieved.…”

Section: Introductionmentioning

confidence: 98%

Circularly polarized patch antenna with high Tx / Rx-separation

Mayer

Scholtz

2009

2009 IEEE International Conference on RFID

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In this contribution an antenna is described that allows simultaneous transmission and reception in the same frequency band. Circular polarization is employed for a most reliable communication with radio frequency identification (RFID) transponders that typically have linearly polarized antennas. To achieve high separation between transmitted and received signals, a square patch antenna originally transmitting horizontally and vertically polarized radiation is combined with a 3 dB-hybrid circuit. With this hybrid circuit the antenna can simultaneously radiate a right-hand circularly polarized wave and receive a left-hand circularly polarized wave. Furthermore, the transmit signal that is unintentionally leaking into the receive path can be compensated by tuning the hybrid circuit with two variable capacitance diodes. At 866 MHz a maximum Tx / Rx-separation of 65 dB was achieved in a static scenario. In a time variant indoor scenario with a metal object moving on a conveyor belt a Tx / Rxseparation of more than 52 dB was achieved by continuously tuning the hybrid circuit with a minimum-search algorithm.

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Section: Introductionmentioning

confidence: 98%

Circularly polarized patch antenna with high Tx / Rx-separation

Mayer

Scholtz

2009

2009 IEEE International Conference on RFID

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“…The MPAs have been widely used for most of the wireless communication applications. Various superstrate geometries were reported in the literature for the enhancement of MPA characteristics, but their configurations are complex [5][6][7][8][9][10][11][12][13][14][15][16][17]. A circular MPA was designed with stubs to generate dual-band for L-band applications [5].…”

Section: Introductionmentioning

confidence: 99%

Design of Microstrip Patch Antenna for Dual-band Operation using Metal Ring Superstrate

K. S*,

Gajera

et al. 2020

IJRTE

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In this paper, a dual-band generation in rectangular microstrip patch antenna (RMPA) using a superstrate metal ring has been proposed. In this configuration, a metal ring is placed above the rectangular patch with the support of two dielectric posts. The metal ring behaves as a superstrate layer and resonator for the lower band, the other band is generated by microstrip patch and hence the combined configuration metal ring and patch gives dual-band characteristics. The lower band resonates at 9 GHz with an impedance bandwidth of 6.8% and higher band at 11.35 GHz with impedance bandwidth of 3.1%. The co-polarized peak gain values at these frequencies are 8.2 dBi and 10.1 dBi respectively. This may be used in applications like airborne and naval-radar. The prototypes are fabricated using commercially available dielectric substrate (RT-Duriod r = 2.2 and thickness h =1.6 mm). The measured results show good agreement with the simulated predictions.

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“…Most of the antennas have tuning stubs inside the patch which is used for resonant of dual-frequency. Recently, some low profile circular MPA with stub outside on the patch using different feeding techniques which improve the bandwidth have been reported in [10][11][12][13]. By introducing single or double stub along the feed axis of circular MP A, dual-band operations obtained [10], by adopting coplanar parasitic ring slot and 978-1-4673-7541-2/15/$31.00 it 2015 IEEE capacitive coupled probe feeds, increases circularly polarized bandwidth [11][12] and by placing the perturbations with capacitive coupling feed, circularly polarized radiation and smaller bandwidth observed [13].…”

Section: Introductionmentioning

confidence: 99%

A novel probe-fed tunable broadband antenna using stub loaded configuration

Dwivedi

Kumar

Tharani

2015

2015 Communication, Control and Intelligent Systems (CCIS)

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In this paper, a novel broadband microstrip patch antenna (MPA) using stub loaded configuration is proposed to enhance the bandwidth of antenna. This antenna is designed for circular radiating patch of 18.2 mm radii to achieve broadband frequency 2.285-2.45 GHz which supports IEEE 802.11 WLAN communications. The percentage bandwidth improves by using variable stub length and fixed width on circular patch antenna. Furthermore, the bandwidth enhanced by 7.2 percent at resonant frequency 2.3 GHz.

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Tuneable and dual-band circular microstrip antenna with stubs

Cited by 42 publications

References 5 publications

Circularly polarized patch antenna with high Tx / Rx-separation

Circularly polarized patch antenna with high Tx / Rx-separation

Design of Microstrip Patch Antenna for Dual-band Operation using Metal Ring Superstrate

A novel probe-fed tunable broadband antenna using stub loaded configuration

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