Circularly polarized annular-ring slot antenna for WiMAX 2.3 GHz and WLAN 2.4 GHz applications

Sim, Chow Yen Desmond; Chang, Ming Hsuan; Chen, Horng Dean; Han, Tuan‐Yung; Row, Jeen Sheen

doi:10.1109/aps.2014.6904852

Cited by 7 publications

(3 citation statements)

References 4 publications

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“…Horst, S. proposed a structure on liquid crystal polymer (LCP) substrate which is added transmission lines to both side of a isolation resistor in 2007 [1]. Power dividers/combiners integrated on CMOS process are proposed [2][3][4]. 60 GHz antenna arrays and Wilkinson power divider/ combiner using low temperature co-fired ceramic (LTCC) technology are also proposed [5].…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, to attain circularly polarized (CP) radiation for a single layer microstrip‐line‐fed slot antenna with CP bandwidths that can cover the 2.4 GHz WLAN (wireless local area network) band, the perturbation technique is usually applied, in which the radiating surface is restructured (or loaded with a single or multiple slit or slot) in a certain manner so that two orthogonal degenerated modes with equal amplitude can be induced. To induce good CP radiation for a slot antenna, the technique of introducing an L‐shaped slit into a ring‐slot , or feeding the slot antenna by implementing a double‐bent microstrip‐line and a narrow slit have been reported; however, the measured CP bandwidths (or 3 dB AR bandwidths) of and were approximately 8–9%. Notably, CP bandwidth of >10% is not commonly observed for such slot antenna design operating in the 2 GHz band.…”

Section: Introductionmentioning

confidence: 99%

“…In this article, a simple microstrip‐line‐fed slot antenna that do not require a 1/4 wavelength impedance transformer or double‐bent microstrip‐line for achieving good impedance matching is proposed. Here, the technique of loading a cross patch into a conventional circular slot to induce CP radiation is initially applied , and the reason for doing so is because it can provide broad CP bandwidth of more than 10%.…”

Section: Introductionmentioning

confidence: 99%

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Circular slot antenna with capacitive loading technique for broad circularly polarized bandwidth

Sim

Yeh

Ban

2016

Micro & Optical Tech Letters

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A microstrip‐fed circular slot antenna design is proposed. To excite good CP (circularly polarized) radiation, the technique of loading a cross patch (with unequal arm lengths) into the circular slot is initially applied. Here, good impedance matching can be further attained by dividing the cross patch into two equal sections with a gap loaded in between them, in which this gap will induce a capacitive loading effects on the proposed antenna. The measured results shown that the proposed antenna has 10 dB impedance bandwidth of 36.4% (2116–3124 MHz), and its corresponding CP bandwidth (along 3 dB axial ratio, AR) was 12.3% (2345–2655 MHz). In addition to that, the proposed CP slot antenna has also yielded peak gains of more than 3.3 dBic across the CP bandwidth. Detailed process of designing the proposed CP slot antenna is explicitly shown, and vital parametric studies were also conducted by simulation. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:715–720, 2016

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Section: Introductionmentioning

confidence: 99%