Tunable coplanar patch antenna using varactor

Holland, B.R.; Ramadoss, Ramesh; Pandey, Suman; Agrawal, P.

doi:10.1049/el:20063554

Cited by 45 publications

(33 citation statements)

References 1 publication

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“…A U-slot is used on the patch with a dimension (W × L) of 77 mm × 57 mm and the antenna attains a tunable frequency range from 2.6 GHz to 3.35 GHz [10]. In [11][12][13][14], it is proved that loading varactor diodes to resonant antennas to demonstrate frequency agility has been widely employed. A 3 GHz folded slot antenna with varactors is reported in [11] with a miniaturization of 30% and a tunability of 5%.…”

Section: Introductionmentioning

confidence: 99%

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A Compact Frequency Reconfigurable Unequal U-Slot Antenna With a Wide Tunability Range

Ren¹,

Li²,

Le³

et al. 2013

PIER Letters

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Abstract-A new frequency reconfigurable unequal U-slot antenna is presented in this paper. The U-slot antenna loaded with two lumped variable varactors is capable of 6 different frequencies switching between 2.3 GHz and 3.6 GHz. The small slots in the ground plane are employed for the biasing circuit to minimize the parasitic effects towards the performance of the antenna. It is found that the unequal U-slot fed by an L-shaped feed line can reduce 30% of the size of the conventional U-slot antenna. Moreover, the proposed antenna offers stable radiation characteristics for each operating frequency in the tunable range. The antenna offers a gain of 4.5 dB in average. The designs are verified through both numerical simulations and measurements of an experimental prototype. Details of the antenna designs and measured results are presented and discussed.

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Section: Introductionmentioning

confidence: 99%

“…It is proposed that a dual-band slot antenna uses a single varactor to achieve tunability in only its second band of operation and has a fixed first band [13]. In [14], the resonant frequency of a coplanar patch antenna is tuned using a varactor component, which is placed over the radiating slot.…”

Section: Introductionmentioning

confidence: 99%

A Compact Frequency Reconfigurable Unequal U-Slot Antenna With a Wide Tunability Range

Ren¹,

Li²,

Le³

et al. 2013

PIER Letters

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“…A coplanar patch antenna is a new CPW fed antenna [4][5][6][7][8], the antenna behaves more like a microstrip patchantenna rather than a loop slot antenna, the resonant frequency of the antenna is primarily determined by the patch length (L) of about a half guided wavelength instead of the total loop size. The antenna has the similar characteristics as microstrip patch antenna --narrow impedance bandwidths.…”

Section: Introductionmentioning

confidence: 99%

“…The impedance bandwidth of a CPA is at -10dB return loss is only 3% [4] , may be not enough for communication systems nowadays. Some methods have been suggested in the literature for bandwidth enhancement [5][6][7][8][9] , including the use of introducing two identical parasitic patches next to the resonant edges of the main patch, which can widen the impedance bandwidth to 8% [10][11][12][13] .…”

Section: Introductionmentioning

confidence: 99%

A novel UWB patch antenna with CPW fed

Wang

Fang

Yanchun

et al. 2010

IET 3rd International Conference on Wireless, Mobile and Multimedia Networks (ICWMMN 2010)

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A novel ultra-wideband (UWB) coplanar patch antenna (CPA)with L-CPW fed is proposed with a wider impedance bandwidth than that of the conventional CPW fed patch antenna. A L-CPW was used to widen the bandwidth of the coplanar patch antenna. The antenna, operating at 7.7GHz was designed and fabricated. The results of return loss, radiation pattern and gain, both simulated and measured, were presented. A Good agreement between the simulation and measurement has been observed. The antenna has an impedance bandwidth at 10dB return loss about 17% and stable radiation patterns, which is suitable for the application of UWB.

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“…21. It is a square loop coplanar antenna 22 ( Fig. 1) consisting of different parts, namely the feeding line, the quarter wavelength matching line and the square radiating element.…”

mentioning

confidence: 99%