CPW-fed ultra-wideband slot antenna with broadband dual circular polarization

Li, Zhen‐Ya; Zhu, Xiangwei; Yin, Chengyou

doi:10.1016/j.aeue.2018.11.018

Cited by 36 publications

(21 citation statements)

References 30 publications

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“…The MIMO antennas capable of generating dual-CP waves (both LHCP and RHCP) at the same frequency are in huge demand these days since these antennas can significantly reduce the mutual coupling and multipath fading effects [17], [18]. In the literature, some planar two-port dual-CP MIMO antennas radiating both LHCP and RHCP waves simultaneously have been reported [19]- [21]. In [19], a two-port coplanar waveguide (CPW)-fed planar antenna composed of two asymmetric T-shaped feed lines was presented for dual circular polarization.…”

Section: Introductionmentioning

confidence: 99%

“…A broadband dual-CP two-port antenna with L-and inverted L-shaped strips on the radiating edges of the monopole was presented in [20], where the antenna was excited by dual orthogonal microstrip lines. In [21], two CPW feeds were utilized for realizing dual circular polarization. The link reliability in wireless systems can be further improved by designing dual-CP MIMO antennas with more than two radiating elements.…”

Section: Introductionmentioning

confidence: 99%

“…Since there is no current coupling, high inter-element isolation levels were reported in such MIMO structures (like isolation >37 dB in [16]). The two-/three-port CP/dual-CP planar MIMO antennas proposed in [14], [19], and [21] can be used in practical systems since they have a single reference voltage level (common ground plane).…”

Section: Introductionmentioning

confidence: 99%

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Planar Four-Port Dual Circularly-Polarized MIMO Antenna for Sub-6 GHz Band

Saxena¹,

Kanaujia²,

Dwari³

et al. 2020

IEEE Access

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In this work, two configurations (Config.-A and Config.-B) of planar four-port dual circularlypolarized (CP) multiple-input-multiple-output (MIMO) antenna are proposed for sub-6 GHz (3.4-3.8 GHz) applications. The MIMO antennas are designed on the FR-4 substrate with size of 60×60×1.6 mm 3. Each radiating element (unit cell) of the MIMO antenna is comprised of a microstrip feed line and an open slot ground plane integrated with two rectangular arms for realizing circular polarization. An I-shaped metallic strip is used in the proposed four-port MIMO Config.-A and Config.-B antennas for obtaining common voltage level in the ground plane. Both MIMO antenna configurations exhibit good impedance matching in the band of interest. In the MIMO Config.-A antenna, all ports provide the same CP band, while in the Config.-B antenna the ports-1/-2 and-3/-4 radiate at different CP bands. The proposed MIMO Config.-A and Config.-B antennas support both types of polarization (left-hand circular polarization (LHCP) and right-hand circular polarization (RHCP)). With the Config.-B antenna, the maximum 3-dB axial-ratio (AR) beamwidths of 118.9 • and 92.7 • are obtained at 3.536 GHz in the xz-and yz-planes, respectively. Furthermore, the Ishaped strip helps in improving 3-dB AR beamwidth in the MIMO Config.-B antenna. Inter-element isolation greater than 19 dB and envelope correlation coefficient (ECC) less than 0.12 (far-field) are achieved between the ports of the fabricated MIMO antenna prototype. INDEX TERMS Connected ground, dual circular polarization, four-port, MIMO antenna, planar.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Planar Four-Port Dual Circularly-Polarized MIMO Antenna for Sub-6 GHz Band

Saxena¹,

Kanaujia²,

Dwari³

et al. 2020

IEEE Access

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show abstract

“…Another work proposed in [22] displays an ARBW of 2.15 GHz. Even though the dual feed arrangements reported in [23,24] satisfy the impedance bandwidth specified for UWB band, they could sketch ARBWs of 4 GHz and 3.22 GHz respectively with a moderate gain around 3 dBi.…”

Section: Introductionmentioning

confidence: 95%

Truncated Circular Microstrip Ultra Wideband Antenna Exhibiting Wideband Circular Polarization

Sam¹,

Abdulla²

2020

PIER C

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Circular polarization is manifested by means of truncations on basic circular radiating patch with precisely designed asymmetric feed. The proposed truncated circular microstrip antenna (TCMA) yields impedance bandwidth (IBW) of 7.6 GHz, almost covering the FCC approved ultra-wideband (UWB) frequency and 3-dB axial ratio bandwidth (ARBW) of 5.05 GHz spreading over two bands, enabling the antenna to be used for multiple applications in UWB frequency range. A peak gain of 5.73 dBi is documented at 5 GHz which is within the circular polarization (CP) band. This single feed antenna is very simple to design and compact in size.

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“…[12][13][14][15] Dual-CP antennas have been investigated in recent times because of their capability to improve the channel capacity of wireless devices. A wideband U-shaped slot CP antenna has been realized by using two microstrip-fed ports 16 or coplanar waveguide ports 17 to generate both right-hand circular polarization (RHCP) and left-hand circular polarization (LHCP). In Reference 18, a substrate integrated waveguide (SIW) horn antenna with dual CP characteristic has been discussed.…”

Section: Introductionmentioning

confidence: 99%

A wideband dual‐circularly polarized 2 × 1 array antenna using multi‐layer substrate for compact structure

Rahman

Nishiyama

Toyoda

2019

Micro & Optical Tech Letters

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A novel compact dual‐circularly polarized (CP) 2 × 1 microstrip array antenna with wideband characteristic is proposed. The antenna is realized using multi‐layer technique. The antenna consists of two orthogonally fed patch elements integrated with a 90° branch‐line coupler for achieving dual‐CP operation. The complete feed network, inspired by double‐sided MIC technology, is designed using microstrip lines and slot lines distributed in different three metal layers. ±90° out‐of‐phase signals caused by the branch‐line coupler are combined with two orthogonal feed lines of the patches to excite right‐hand circular polarization (RHCP) or left‐hand circular polarization (LHCP). More than 40% size reduction is achieved by employing multilayer structure instead of single‐layer structure. The measured 3‐dB axial ratio bandwidths of RHCP/LHCP are 8.31/10.19%. Peak gain is more than 9 dBic with good CP radiation performance. The antenna performance is validated by measured data.

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CPW-fed ultra-wideband slot antenna with broadband dual circular polarization

Cited by 36 publications

References 30 publications

Planar Four-Port Dual Circularly-Polarized MIMO Antenna for Sub-6 GHz Band

Planar Four-Port Dual Circularly-Polarized MIMO Antenna for Sub-6 GHz Band

Truncated Circular Microstrip Ultra Wideband Antenna Exhibiting Wideband Circular Polarization

A wideband dual‐circularly polarized 2 × 1 array antenna using multi‐layer substrate for compact structure

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