Unidirectional CPW-fed slot antenna using metasurface

Rakluea, Chawalit; Chaimool, Sarawuth; Rakluea, Paitoon; Akkaraekthalin, Prayoot

doi:10.1109/ecticon.2011.5947803

Cited by 9 publications

(3 citation statements)

References 5 publications

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“…This value shifts the operating frequency to 2.45 GHz with a small return loss, i.e., -27.5 dB, wide-10 dB bandwidth of 730 MHz (1.9-2.63 GHz) and total gain of 2.52 dB. An immediate future work is to apply further gain enhancement and size miniaturization techniques such as the Metasurface Superstare (MSS) [14][15][16] to increase gain and using series of parallel strip lines [17] or loading wires [18] to achieve further miniaturization. …”

Section: Gain Enhancement Of Cpw-feed Square Slot Antennamentioning

confidence: 99%

S - band Planar Antennas for a CubeSat

Tubbal¹,

Raad²,

Chin³

et al. 2015

ijeei

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This paper studies the suitability of shorted patch and CPW-feed square slot antennas for CubeSat communications. To study the effect of the CubeSat body on the antennas performance, we have simulated both antennas in the High Frequency Structure Simulator (HFSS) with and without the CubeSat body. Compared to CPWfeed square slot antenna, the shorted patch antenna achieves higher gain and wider bandwidth. We have also re-dimensioned both antennas to shift their resonant frequencies to 2.45 GHz using Quasi Newton method in HFSS. This thus enables their use in the unlicensed ISM band. The repurposed shorted patch has smaller return loss; e.g., -27.5 dB (without CubeSat), higher gain; e.g., 5.3 dBi and wider bandwidth than the repurposed CPW-feed Square slot antenna. Lastly, further enhancement in the gain of re-dimensioned CPW-feed square slot antenna shows an increase of total gain from 2 to 2.52 dB.

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Section: Gain Enhancement Of Cpw-feed Square Slot Antennamentioning

confidence: 99%

S - band Planar Antennas for a CubeSat

Tubbal¹,

Raad²,

Chin³

et al. 2015

ijeei

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“…Several other techniques need to be applied in order to get the radiation pattern unidirectional [16].…”

Section: Far Field Radiation Patternmentioning

confidence: 99%

CPW fed rectangular slot antenna with dual H-slot on ground for wideband wireless applications

Sharma

Saxena

Goodwill

et al. 2015

2015 International Conference on Signal Processing and Communication (ICSC)

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In this paper the design of a Co-Planar waveguide (CPW) fed rectangular slot microstrip patch antenna is presented. This antenna is simulated in Microwave Studio on Computer Simulation Tools (CST 2012). In this design two H-slot have been etched on the ground in order to make wideband antenna. This slot on the ground helps in reducing the overall size of the antenna. The proposed antenna has impedance band width of 1.225 GHz. Return loss remain below -10 dB line (for 90% power to be radiated) in the frequency range starting from 4.3127 GHz to 5.537 GHz. Reasonably gain of 4.707 dB has been achieved in simulation of this antenna.

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“…Also, there is a risk it might not deploy, which contributes to the likelihood of mission failure. In terms of size, the antenna in [11] has the smallest size of 75 mm×75 mm but its main limitation, as pointed out by the authors, is the resulting low gain, i.e., 1.53 dBi, because of its bi-directional radiation [12]. To solve this problem, one common approach is to redirect the back radiation pattern forward by placing a backing metallic reflector that is λ/4 away from the antenna [8].…”

Section: Introductionmentioning

confidence: 99%

A high gain S-band slot antenna with MSS for CubeSat

et al. 2018

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Cube satellites, aka CubeSats, are a class of tiny satellites that have become popular for space programs. This is because they can be built relatively cheaply using commercial off-the-shelf components. Moreover, CubeSats can communicate with each other, and assemble into swarms to carry out different functions: e.g., wide area measurements and sensing. Swarms of CubeSats also have the effect of increasing the contact period with ground stations allowing for a longer communications window. These capabilities require CubeSats to be equipped with an efficient, high gain, small antenna to facilitate cross-link or intersatellite communications. Henceforth, this paper presents a high gain coplanar waveguide (CPW)-fed slot antenna for CubeSats. A key feature is the use of a metasurface superstrate structure (MSS) to significantly improve gain and reduce back-lobe emissions. This also has the advantage of minimizing interference to components inside a CubeSat. We have comprehensively evaluated the antenna using the high-frequency simulator structure (HFSS) as well as a carrying out testing on a 3 U (10 x 10 x 30 cm3) CubeSat platform. We have studied the effect of MSS element sets and their position and the effect of a 3-U CubeSat body on the performance of the proposed antenna. The experimental results confirm that our antenna achieves a return loss of 21.5 dB and a fractional impedance bandwidth (BW) of 55.91% with S11 ≤ 10 dB and has a simulated and measured gains of 9.71 and 8.8 dBi respectively at the desired frequency of 2.45 GHz. In contrast, amongst all previous S-band planar antennas that are suitable for CubeSats, the best gain is only 5.96 dB at 2.45 GHz.

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Unidirectional CPW-fed slot antenna using metasurface

Cited by 9 publications

References 5 publications

S - band Planar Antennas for a CubeSat

S - band Planar Antennas for a CubeSat

CPW fed rectangular slot antenna with dual H-slot on ground for wideband wireless applications

A high gain S-band slot antenna with MSS for CubeSat

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