Novel square slot circularly polarized antenna with broadband characteristics

Hao, Lichao; Fan, ChangQi; Wang, Hao; Li, Bo; Yin, Wei

doi:10.1002/mmce.22921

Cited by 7 publications

(4 citation statements)

References 20 publications

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“…A lot of work has been done to further broaden the axal ratio bandwidth (ARBW) of the square slot antennas in past years [3][4][5][6][7][8][9][10][11][12][13]. A widely used method is to introduced perturbations to excite two orthogonal modes that have equal amplitudes but with a 90 phase difference.…”

Section: Introductionmentioning

confidence: 99%

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A Broadband Circularly Polarized Antenna with Stable Gain Based on Square Slotted Ground

Song²,

Sheng³

2023

J. Phys.: Conf. Ser.

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In this paper, a circularly polarized (CP) low cost, low profile antenna with broadband stable gain is proposed. The antenna consists of a grounded square slot with two inverted-L shaped microstrips, an asymmetrical Y-shaped microstrip radiator with a stub, and several fine tuning elements. The CP radiation is first realized by using the Y-shaped microstrip line, which incorporates a stub is to realize better impedance matching. Next, by utilizing two Inverted-L microstrips into the corners of the grounded slot, the axial ratio (AR) characteristic can be further improved. A wider AR bandwidth (ARBW) can be achieved by utilizing four rectangular strips as fine tuning elements. Simulation results show the proposed antenna demonstrates a radiation with a CP bandwidth of 50% and a stable gain with average value of 5.18 dBi.

show abstract

Section: Introductionmentioning

confidence: 99%

“…To excite an orthogonal mode, a parasitic microstrip connecting to the end of the feeding line is utilized, and CP radiation with an ARBW of 49% is achieved [11]. A corner-cut ground together with a semielliptical patch and L-shaped feeding line is presented to achieve an ARBW of 59% [12].…”

Section: Introductionmentioning

confidence: 99%

A Broadband Circularly Polarized Antenna with Stable Gain Based on Square Slotted Ground

Song²,

Sheng³

2023

J. Phys.: Conf. Ser.

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“…Moreover, a three-dimensional printed antenna was designed to realize a tunable wideband CP characteristic with the aid of varactor diodes [11]. A square slot antenna with perturbation element and inverted L-shaped tuning stub was used for ARBW coverage of 2.58-4.74 GHz [12]. A cavity-backed aperture antenna was proposed to improve ARBW and the peak gain over the frequency band from 4.8 to 7.4 GHz [13].…”

Section: Introductionmentioning

confidence: 99%

A Compact Wideband Circularly Polarized Planar Monopole Antenna With Axial Ratio Bandwidth Entirely Encompassing the Antenna Bandwidth

et al. 2022

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The antenna presented in this study is a compact wideband monopole with wideband circular polarization that can be used across the whole antenna bandwidth. A rectangular C-shaped patch is partially covered by a ground plane in the proposed planar monopole antenna. Inserting a rectangular stub to the ground plane, etching a slit at the antenna patch, and adding a semicircular stub at the top of the antenna feed line increase the antenna impedance bandwidth (BW) and axial ratio bandwidth (ARBW). An FR4 substrate with overall dimensions of 25 mm×25 mm×1.6 mm is used to create the antenna. The antenna's observed impedance BW is 70% (4.55 GHz in the 4.3-8.85 GHz band), while the measured broadside ARBW is improved to a value of 82.2 percent (5.3 GHz along the range 3.8-9.1 GHz). The impedance BW is perfectly covered by the ARBW; hence the antenna can be considered circularly polarized throughout its operational spectrum. Within the antenna BW, the measured gain is greater than 1.5 dB.

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“…There have been many attempts to design antennas with multiband CP [3][4][5] and wideband CP [6][7][8] to cover as large a bandwidth as possible. However, these designs have significant back radiation that is not circularly polarized.…”

Section: Introductionmentioning

confidence: 99%

Single-Element and MIMO Circularly Polarized Microstrip Antennas with Negligible Back Radiation for 5G Mid-Band Handsets

Alnahwi

Al‐Yasir

See

et al. 2022

Sensors

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In this paper, single-element and MIMO microstrip antenna with two pairs of unequal slits is proposed as a circularly polarized antenna with negligible back radiation for 5G mid-band handsets. The unequal pairs of slits are engraved on the antenna patch to guarantee the presence of the circular polarization (CP). The proximity-coupled feeding technique is used to excite the proposed microstrip antenna in order to provide larger antenna −10 dB bandwidth which approaches 10.8% (3.48–3.87 GHz). A novel analysis technique is proposed in this paper that demonstrates the 3D axial ratio pattern in order to generate CP in the broadside direction without affecting the structure of the ground plane which ensures weak back radiation. The 3 dB axial ratio bandwidth (ARBW) is found to be equal to 4.1% extended along the range (3.58–3.73 GHz). To make the design more compatible with the 5G mid-band handsets, the 2 × 2 MIMO structure of the proposed antenna with reduced mutual coupling (less than −20 dB) is also presented in this work. The simulation and measured results are in good agreement, and both verify the CP characteristics and the weak back radiation of the proposed antenna.

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Novel square slot circularly polarized antenna with broadband characteristics

Cited by 7 publications

References 20 publications

A Broadband Circularly Polarized Antenna with Stable Gain Based on Square Slotted Ground

A Broadband Circularly Polarized Antenna with Stable Gain Based on Square Slotted Ground

A Compact Wideband Circularly Polarized Planar Monopole Antenna With Axial Ratio Bandwidth Entirely Encompassing the Antenna Bandwidth

Single-Element and MIMO Circularly Polarized Microstrip Antennas with Negligible Back Radiation for 5G Mid-Band Handsets

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