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oe1(光电查) - 科学论文

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出版时间
  • 2018
研究主题
  • circularly polarized (CP) antenna
  • Elliptical microstrip antenna (EPMA)
  • impedance bandwidth (IBW)
  • defected ground (DG) technique
  • multi-layered stacked structure
  • axial ratio bandwidth (ARBW)
应用领域
  • Optoelectronic Information Science and Engineering
机构单位
  • Bhagwant University, Ajmer, Rajasthan, India
  • Govt Mahila Engineering College, Ajmer, Rajasthan, India
97 条数据
?? 中文（中国） ▾

  • [IEEE 2018 15th European Radar Conference (EuRAD) - Madrid, Spain (2018.9.26-2018.9.28)] 2018 15th European Radar Conference (EuRAD) - A Circularly Polarized Circular Antenna Array for Satellite TV Reception

    摘要： This paper proposes a novel design of a wideband compact circularly polarized circular antenna array for satellite TV reception. The circular array is based on a wideband circularly polarized spiral antenna element which has excellent impedance matching (VSWR ≤ 1.5) and axial ratio bandwidths for the satellite-to-ground downlink at Ku-band from 11.7-12.7 GHz. A 16-element circular sub-array is presented with a fixed 23° electronically steered beam upwards which is appropriate for Astra satellite communications in the UK. Furthermore, circular sub-arrays with different numbers of elements (8, 16, 24, 32 and, 40) are also studied. It is shown that the circular antenna array is particularly suitable for satellite TV reception while being vertically mounted on a wall because of its low profile, broadband and electronically steered beam.

    关键词： Circular array,electronic steering,satellite communications,circularly-polarized antenna,spiral antenna

    更新于2025-09-04 15:30:14

  • COMPACT CIRCULARLY POLARIZED CROSSED DIPOLE ANTENNA WITH CHIP INDUCTORS AND SQUARE RINGS LOADING FOR GPS APPLICATIONS

    摘要： A compact circularly polarized (CP) crossed dipole antenna with chip inductors and square rings loaded for Global Positioning System (GPS) is proposed in this letter. The CP radiation is produced by crossing two dipoles through a 90? phase delay line of a vacant-quarter printed ring. Four chip inductors inserted in the dipole arms and four square rings loaded at the back of the dipole arms are introduced to obtain a compact dipole size. The plane dimension of the proposed antenna is 28 mm × 28 mm, which can be widely used for GPS handheld devices. Details of the proposed antenna design and results are presented and discussed.

    关键词： compact circularly polarized,GPS,square rings,chip inductors,crossed dipole antenna

    更新于2025-09-04 15:30:14

  • Wideband circularly polarized magnetoelectric dipole antenna with I-slot for C-band applications

    摘要： This paper presents a circularly polarized wideband magnetoelectric dipole antenna with a defective semicircular patch for C-band applications (4–8 GHz). In the proposed design, in order to get proper impedance matching and stable gain, a pair of folded vertical patches is shorted between a pair of defective semicircular patches and minimum ground plane. The defective semicircular patches work as an electric dipole, while the vertical patches work as a magnetic dipole. The Γ-shaped single-feed structure is used to excite both dipoles together to achieve symmetrical radiation patterns. Minimum ground and the folded structure maintain the low profile of the presented design. The circular polarization is obtained by incorporating I-shaped slots in semicircular patches, extending to the lower and upper sides of the curved edges symmetrically on the both sides. A prototype was manufactured and the measured results agreed well with the simulated results. The results show an impedance bandwidth of 60.37% (S11 < ? 10 dB) from 3.71 to 6.91 GHz, 3-dB axial ratio bandwidth of 20.60% from 3.71 to 4.55 GHz and a broadside stable gain of 6 ± 0.5 dBic. The antenna also shows good radiation efficiency of around 80% over the entire operating range. Therefore, the proposed antenna can be used in 5G Wi-Fi (5.15–5.875 GHz) wireless communication systems and several C-band applications.

    关键词： Axial ratio,Magnetoelectric dipole,Circularly polarized,Wideband

    更新于2025-09-04 15:30:14

  • [IEEE 2018 IEEE International Conference on Electro/Information Technology (EIT) - Rochester, MI (2018.5.3-2018.5.5)] 2018 IEEE International Conference on Electro/Information Technology (EIT) - Hybrid Perturbation Technique Applied to Stacked Patches for Circular Polarization

    摘要： In this paper, a wideband circularly polarized (CP) stacked microstrip antenna is presented. CP is achieved by using hybrid perturbation technique, where positive perturbations are applied to the driven patch and negative perturbations to the parasitic patch. The axial ratio bandwidth achieved is wider than that from typical CP patch antennas. The antenna is excited by a probe-feed without requiring any complex dual feed network to generate two equal and orthogonal modes necessary for the CP generation. This reduces the system complexity and saves space in the antenna in comparison to those with dual feeds. The antenna exhibits a simulated impedance bandwidth of (for S11 = -10 dB) 10.4%, and axial ratio (AR ~ 3 dB) bandwidth of 2.8%. The antenna demonstrates broad axial ratio beamwidth in both planes which is useful for wide angular coverage.

    关键词： hybrid perturbations,axial ratio bandwidth,stacked patch antenna,Circularly polarized (CP) antennas,microstrip antennas

    更新于2025-09-04 15:30:14

  • [Institution of Engineering and Technology 12th European Conference on Antennas and Propagation (EuCAP 2018) - London, UK (9-13 April 2018)] 12th European Conference on Antennas and Propagation (EuCAP 2018) - A Compact Omnidirectional Circularly Polarized Antenna

    摘要： A compact omnidirectional circular polarization (CP) antenna is presented. The antenna consists a top-loaded cylindrical monopole and a modified circular ground plane with extended curved branches. Vertical and horizontal polarized field components are generated through the monopole and extended curved branch of ground, respectively. With a size of 0.241..0*0.241..0*0.121..0, the antenna exhibits a lO-dB impedance bandwidth of 3.9% from 1.54 to 1.61 GHz and a 3-dB axial-ratio (AR) bandwidth of 7.5% from 1.52 to 1.62GHz in the horizontal plane. The measured average axial ratio and left-hand CP (LHCP) gain at 1.561 GHz are 2 dB and 1.4 dBi, respectively, in the horizontal plane.

    关键词： compact,Omnidirectional antenna,circularly polarized antenna

    更新于2025-09-04 15:30:14

  • COMPACT WIDE-BEAM CIRCULARLY POLARIZED ANTENNA WITH STEPPED ARC-SHAPED ARMS FOR CNSS APPLICATION

    摘要： A single-feed circularly polarized wide-beam antenna is proposed for Compass Navigation Satellite System (CNSS) application. The antenna consists of four stepped arc-shaped arms, which are applied to generate circularly polarized radiation. To broaden the beamwidth, each arm is split up into two horizontal arc-shaped parts and one vertical part. The proposed antenna is simulated, fabricated and tested. The measured results show that the 10-dB return loss band of the proposed antenna is from 2.37 GHz to 2.65 GHz and the 3-dB axial ratio band from 2.42 GHz to 2.55 GHz, covering the receiving band (2.49175 GHz ± 4.08 MHz) of CNSS. Its 3-dB AR beamwidth is 181? at 2.491 GHz. For the horizontal radiation pattern of the proposed antenna at 5? elevation angle, the RHCP gain is greater than ?1.1 dBic, and the out-of-roundness is 1 dB. Additionally, the proposed antenna has a size of 0.37λ0 × 0.37λ0 × 0.11λ0 with respect to 2.491 GHz.

    关键词： wide-beam,stepped arc-shaped arms,Circularly polarized,CNSS

    更新于2025-09-04 15:30:14

  • DUAL-BAND DUAL-SENSE CIRCULARLY POLARIZED SLOT ANTENNA WITH AN OPEN-SLOT AND A VERTICAL STUB

    摘要： A new dual-band dual-sense circularly polarized (CP) slot antenna is designed in this paper. The proposed antenna is composed of a rectangle patch and a modi?ed ground plane. By opening a U-shaped open-slot and loading a vertical stub to the ground plane, a dual-sense CP performance is achieved for two frequency bands. A bevel is cut on the patch to improve the impedance matching. The antenna is fabricated on a low-cost FR4 substrate and fed by a coplanar waveguide (CPW) structure. The antenna has been investigated numerically, and a prototype was experimentally measured. Experimental results show that the measured 10-dB return loss impedance bandwidths are 18.3% (2.72–3.27 GHz) for the lower band and 23.7% (4.65–5.90 GHz) for the upper band, and the measured 3-dB axial ratio (AR) bandwidths for the lower and upper bands can be up to 28.4% (2.48–3.30 GHz) and 26.3% (4.63–6.03 GHz), respectively.

    关键词： open-slot,vertical stub,slot antenna,dual-band,circularly polarized,dual-sense

    更新于2025-09-04 15:30:14