Broadband Circularly Polarized Bowtie Antenna Array Using Sequentially Rotated Technique

Zhang, Zhi-Ya; Zuo, Shaoli; Zhao, Yarui; Ji, Lu‐Yang; Fu, Guang

doi:10.1109/access.2018.2802938

Cited by 11 publications

(9 citation statements)

References 35 publications

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“…where k represents the coupling coefficient, Z S is the port impedance of the input, and Z L is the port impedance of each output. According to (2), the symmetry of the 1-to-4 Marchand balun determines that the four outputs naturally owns equal amplitudes and 180 • progressive phase shifts, regardless of the coupling factor and port terminations. To achieve input matching S 11 = 0, the coupling coefficient k is as high as √ 2 under the condition of Z S = Z L = 50 .…”

Section: B 1-to-4 Marchand Balunmentioning

confidence: 99%

A Wideband LTCC Quad-Phase Power Dividing Network and its Application to Ceramic-Based Quadrifilar Helix Antennas

et al. 2019

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A wideband LTCC quad-phase power dividing network, which owns one input and four outputs, is proposed in this paper. It is composed of a 1-to-4 Marchand balun and two 90 • phase shifters so as to realize four outputs with equal amplitudes and 90 • progressive phase shifts. An example, covering a frequency band from 1.2 GHz to 1.6 GHz, is designed for most frequency bands of the world's four satellite communication and navigation systems. The measured results show that the proposed power dividing network features good performance, such as an amplitude imbalance smaller than 0.8dB and a phase deviation within ±10 • . For verification, two ceramic-based quadrifilar helix antennas (QHAs) fed by the proposed power dividing network are designed at 1.561 GHz with right-handed circular polarization (RHCP) and left-handed circular polarization (LHCP), respectively. Both QHAs owns superiorities in size, axial ratio (AR), beamwidth, crosspolarization discrimination, front-to-back ratio, which validates the function of the proposed power dividing network as well.INDEX TERMS Power dividing network, quad-phase, LTCC, quadrifilar helix antenna (QHA), circular polarization, ceramic. I. INTRODUCTIONCircularly polarized antennas are widely applied in many communication systems, especially in the world's four satellite communication and navigation systems [1]- [21]. Quadrifilar helix antenna (QHA) is a promising candidate due to its attractive features of superior axial ratio (AR), broad beamwidth, high cross-polarization discrimination, high front-to-back ratio, compact structure, light weight and so on [4]-[21]. A complete QHA usually consists of a radiator with four metal arms and a quad-phase power dividing network that provides specific excitations with equal amplitudes and 90 • progressive phase shifts.Since its invention in 1968, two main techniques, namely wire technique and printed technique, have been applied toThe associate editor coordinating the review of this manuscript and approving it for publication was Sudipta Chattopadhyay.

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Section: B 1-to-4 Marchand Balunmentioning

confidence: 99%

A Wideband LTCC Quad-Phase Power Dividing Network and its Application to Ceramic-Based Quadrifilar Helix Antennas

et al. 2019

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“…Recently, circularly polarized antennas have been made by using single feed [16,17], dual feed [18][19][20][21][22], or a sequential phase feed (multiple-feeds) [23][24][25][26][27]. Using single feeds can reduce the design complexity, but they have narrow 3 dB AR bands [16] or low gain and radiation efficiency [17].…”

Section: Introductionmentioning

confidence: 99%

“…Due to the large difference in amplitude and phase excitation in a narrow range of frequency, they only showed 12% and 31% AR bandwidths. A wideband circularly polarized bowtie antenna array was presented in [25]. The antenna array's 3-dB AR bandwidth was increased by using the sequential rotation approach.…”

Section: Introductionmentioning

confidence: 99%

Multiband Ambient RF Energy Harvester with High Gain Wideband Circularly Polarized Antenna toward Self-Powered Wireless Sensors

Nguyễn

2021

Sensors

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In this work toward a sustainable operation of a self-powered wireless sensor, we investigated a multiband Wi-Fi/3G/4G/5G energy harvester based on a novel wideband circularly polarized antenna, a quadplexer, and rectifiers at four corresponding bands. This proposed antenna consisted of four sequentially rotated dual-dipoles, fed by a hybrid feeding network with equal amplitude and an incremental 90° phase delay. The feeding network was composed of three Wilkinson power dividers and Schiffman phase shifters. Based on the sequential rotation method, the antenna obtained a −10 dB reflection coefficient bandwidth of 71.2% from 1.4 GHz to 2.95 GHz and a 3 dB axial ratio (AR) bandwidth of 63.6%, from 1.5 GHz to 2.9 GHz. In addition, this antenna gain was higher than 6 dBi in a wide bandwidth from 1.65 GHz to 2.8 GHz, whereas the peak gain was 9.9 dBi. The quad-band rectifier yielded the maximum AC–DC conversion efficiency of 1.8 GHz and was 60% at −1 dBm input power, 2.1 GHz was 55% at 0 dBm, 2.45 GHz was 55% at −1 dBm, and 2.6 GHz was 54% at 0.5 dBm, respectively. The maximum RF–DC conversion efficiency using the wideband circularly polarized antenna was 27%, 26%, 25.5%, and 27.5% at −6 dBm of input power, respectively.

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“…Further, by adding parasitic elements nearing the cross-dipole arms, a wider 3-dB AR bandwidth was obtained [5], [6]. Other antennas, such as the stacked patch antenna [7], the sequentially rotated microstrip patch antenna array [8], and the hybrid dielectric resonator antenna [9], [10], are also good candidates for wideband CP operation.…”

Section: Introductionmentioning

confidence: 99%

An Ultra-Wideband Circularly Polarized Asymmetric-$S$ Antenna With Enhanced Bandwidth and Beamwidth Performance

Zhang

et al. 2019

IEEE Access

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This paper introduces an ultra-wideband circularly polarized (CP) asymmetric-S antenna with wide axial ratio beamwidth (ARBW) for C-band applications. The proposed antenna is realized by bending a linearly polarized dipole into asymmetric-S shape with variable trace width, which achieves CP radiation. Unlike the reported symmetric-S antenna, the proposed antenna is constituted with two unequal curved arms to enhance the bandwidth and beamwidth performances. Compared with the symmetric-S antenna, the proposed antenna demonstrates much wider AR bandwidth and wider ARBW over broader frequency range. A prototype is fabricated to verify the design principle. The measured and simulated results are very consistent and both indicate that the proposed antenna has a wide impedance bandwidth (VSWR < 2) of 70.2% (3.58 to 7.46 GHz), and a wide 3-dB AR bandwidth of 84.8% (2.75 to 6.8 GHz). Moreover, maximum ARBW of 153 • is achieved, and a 3-dB ARBW of more than 100 • is maintained within a wide operation bandwidth of 46.3% (3.65-5.85 GHz).INDEX TERMS Circularly polarized antenna, wide axial ratio beamwidth, ultra-wideband antenna.

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Broadband Circularly Polarized Bowtie Antenna Array Using Sequentially Rotated Technique

Cited by 11 publications

References 35 publications

A Wideband LTCC Quad-Phase Power Dividing Network and its Application to Ceramic-Based Quadrifilar Helix Antennas

A Wideband LTCC Quad-Phase Power Dividing Network and its Application to Ceramic-Based Quadrifilar Helix Antennas

Multiband Ambient RF Energy Harvester with High Gain Wideband Circularly Polarized Antenna toward Self-Powered Wireless Sensors

An Ultra-Wideband Circularly Polarized Asymmetric-$S$ Antenna With Enhanced Bandwidth and Beamwidth Performance

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