- 标题
- 摘要
- 关键词
- 实验方案
- 产品
-
[IEEE 2018 International Conference on Microwave and Millimeter Wave Technology (ICMMT) - Chengdu, China (2018.5.7-2018.5.11)] 2018 International Conference on Microwave and Millimeter Wave Technology (ICMMT) - A Compact Circularly Polarized Implantable Antenna for Wireless Medical Telemetry
摘要： A novel miniaturized circularly polarized (CP) patch antenna operating at 915MHz ISM band is designed in this work for wireless biomedical communication. By taking advantage of loading stubs, the proposed antenna features a good miniaturization with the compact size of 13.88×13.88×1.27mm3. A pair of truncated corners in diagonal directions of the planar patch are used for the generation of circular polarization. The simulated 3-dB axial-ratio(AR) bandwidths of around 16MHz is achieved for the proposed antenna, while the impedance bandwidth is 47MHz for |S11| less than -10 dB.
关键词： miniaturization,Circularly polarized (CP),implantable antenna
更新于2025-09-23 15:23:52
-
[IEEE 2018 International Conference on Microwave and Millimeter Wave Technology (ICMMT) - Chengdu, China (2018.5.7-2018.5.11)] 2018 International Conference on Microwave and Millimeter Wave Technology (ICMMT) - A Compact Omnidirectional Circularly Polarized Antenna for 5G Communication System
摘要： In this paper, a compact omnidirectional circularly polarized antenna for 5G communication system is proposed. The design concept is the combination of vertical currents and a surrounding loop current. A center disk-loaded feeding pin and four plated vias are utilized to generate the vertical component of the electric field. While a square loop is employed to produce the horizontal component. Simulation results indicates that the overlapped impedance and AR bandwidth ranges from 27.3 to 28.6 GHz, which covers the 27.5-28.35 GHz band for 5G cellular communication systems. Good omnidirectional radiation patterns can be obtained in azimuthal plane.
关键词： compact antenna,Circularly polarized (CP),5G communication
更新于2025-09-23 15:22:29
-
Simple Design Procedure of a Broadband Circularly Polarized Slot Monopole Antenna Assisted by Characteristic Mode Analysis
摘要： In this paper, a systematic design procedure of a compact and broadband circularly polarized (CP) antenna is proposed. The antenna is first designed with a C-shaped monopole, and then a C-shaped slotted patch is utilized to produce CP radiation in the lower frequency band. Thus, the antenna's overall CP bandwidth (BW) is significantly increased. In addition, unlike the conventional method in which the operation is verified by the simulated surface current distribution, characteristic mode analysis (CMA) is carried out to give more insight into different modes on the antenna and generation of circular polarization. The CMA also helps to realize a structural optimization and identify an efficient feed location. The optimized antenna prototype with a compact size of 0.29λo × 0.29λo × 0.01λo (λo is the minimum wavelength at the minimum operation frequency) achieves a usable 10-dB reflection coefficient and 3-dB axial ratio fractional BW of 91% (2.1–5.6 GHz). The antenna realized broadside gain varies from 1.5 to 3.2 dBic within this measured overlapped BW.
关键词： UWB antenna,slot,circularly polarized (CP),monopole,characteristic mode (CM)
更新于2025-09-23 15:22:29
-
DESIGN AND REALIZATION OF CIRCULAR POLARIZED SIW SLOT ARRAY ANTENNA FOR CUBESAT INTERSATELLITE LINKS
摘要： This paper presents the design and fabrication of an antenna based on Substrate Integrated Waveguide (SIW) for intersatellite crosslinks in C-band. The entire antenna consists of two elements of SIW slots array that is fed by a hybrid 3 dB directional coupler. The entire SIW slots array antenna is circularly polarized (CP), and each element has four longitudinal slots. The element’s e?ective ?eld matching is realized with a microstrip to SIW transition. The antenna design has been evaluated with its return loss, gain plot, and radiation pattern characteristics to validate the fabricated antenna. The fabricated prototype antenna radiates a left-handed circularly polarized (LHCP) electromagnetic wave with the peak gain of 5 dB and o?ers approximately 2% AR bandwidth around 5 GHz.
关键词： circularly polarized (CP),intersatellite links,slot array antenna,CubeSat,Substrate Integrated Waveguide (SIW)
更新于2025-09-23 15:21:01
-
A Circularly-Polarized Differentially-Fed Transmission-Line-Excited Magneto-Electric Dipole Antenna Array for 5G Applications
摘要： A differentially-fed circularly-polarized magneto-electric dipole (ME-dipole) array is proposed for 5G applications. The proposed transmission-line-excited (TLE) antenna, fabricated on a printed-circuit-board (PCB), can achieve wide impedance and axial ratio (AR) bandwidths and high gain. The antenna consists of a 2×2 ME-dipole array enclosed by a circular cavity. It is modified from our previous work on linearly-polarized (LP) array with its element orientation selectively rotated by ±45o with respect to the differentially-fed transmission line and the use of sequential rotation technique (SRT) to generate circularly-polarized (CP) radiation. A differential feed network is utilized to feed the prototype for experiments. Experiments show that the antenna can present an overlapping impedance and AR bandwidth of 32.2% from 52.2 to 72.2 GHz with a broadside left-handed CP (LHCP) gain from 10.2 to 11.8 dBic. The proposed CP antenna retains all the salient features of our previously proposed linearly-polarized (LP) antenna in symmetric and stable radiation patterns and relatively low back radiation levels.
关键词： fifth generation (5G),Circularly-polarized (CP),magneto-electric dipole (ME-dipole),differential feed
更新于2025-09-19 17:15:36
-
Low-Cost Compact Circularly Polarized Dual-Layer PIFA for Active RFID Reader
摘要： This communication presents a novel single-fed compact circularly polarized (CP) dual-layer planar inverted-F antenna (PIFA). The proposed antenna is composed of two stacked orthogonal-orientated PIFAs which can be fabricated by elaborately folding one piece of metal plate. And the two PIFAs can be excited synchronously with equally allocated power by a single probe, thus a pair of orthogonal polarizations is created. Moreover, the resonant lengths of the upper and lower PIFAs are slightly different from each other to acquire 90° phase shift between the two orthogonal polarizations. Consequently, a right hand circularly polarized radiation is achieved, and the boresight realized gain is 3.8 dBic at the center frequency. The proposed dual-layer PIFA with two quarter-wavelength resonators provides a novel solution for the compactness of CP antennas. To validate the performance of the antenna, a prototype was fabricated and measured. The measured -10 dB impedance bandwidth and 3 dB axial ratio bandwidth are 7.4% and 1.1%, respectively, with a compact antenna volume of 0.26 × 0.22 × 0.05 λ0 3. The proposed antenna is a good candidate for the 433 MHz CP active Radio Frequency Identification reader, and it has the merits of compact size, light weight, high efficiency and low-cost.
关键词： circularly polarized (CP),dual-layer,Radio Frequency Identification (RFID),planar inverted-F antenna (PIFA)
更新于2025-09-09 09:28:46
-
[IEEE 2018 International Conference on Advances in Computing, Communications and Informatics (ICACCI) - Bangalore, India (2018.9.19-2018.9.22)] 2018 International Conference on Advances in Computing, Communications and Informatics (ICACCI) - Design and Analysis of Circularly Polarized Defected Ground Elliptical Patch Antenna for Long Term Evolution (LTE) and 4G Wireless Applications
摘要： In this article the strategy and analysis of a defected ground stacked elliptical patch microstrip antenna (EPMA) is presented for circular polarization (CP). This antenna gives an impedance bandwidth of 44.0% with respect to resonant frequency 1.98GHz, which is eight times greater in comparision to conventional elliptical patch microstrip antenna (EPMA) along with axial ratio bandwidth of 5.5% with reverence to frequency 1.98GHz. The antenna is studied on a Flame Retardant (FR-4) substrate having substrate permittivity 4.4 and thickness 1.59mm. The CP behaviour is observed by truncating the conventional elliptical patch and inserting slots. A square slot is also etched in ground plane at an angle of 45 degrees with respect to horizontal axis. This antenna design having a dimension of ground plane 35.0×32.0 mm2. To achieve the higher impedance bandwidth, the technique of multilayer stacked of patch is used. The over all height of antenna is 9.18mm. This antenna can be used in Long Term Evolution (LTE) and 4G Wireless Applications.
关键词： circularly polarized (CP) antenna,Elliptical microstrip antenna (EPMA),impedance bandwidth (IBW),defected ground (DG) technique,multi-layered stacked structure,axial ratio bandwidth (ARBW)
更新于2025-09-09 09:28:46
-
[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