- 标题
- 摘要
- 关键词
- 实验方案
- 产品
-
Differentially-Fed Aperture-Coupled Magneto-Electric Dipole Antenna With Continuously Variable Beamwidth
摘要： A beamwidth reconfigurable linear array antenna utilizing three magneto-electric (ME) dipole antenna elements with no need for a complex feeding network is presented. In this design, the ME dipole antenna elements are differentially excited by three parallel transverse resonant slots etched on the broad wall of a substrate integrated waveguide (SIW) cavity. By symmetrically embedding four copper posts that are connected to varactor diodes between the adjacent slots, the electric field perturbation in the SIW cavity can be realized by manipulation of the varactors. In other words, altering bias voltage of all the varactors simultaneously could offer granular control over the excitation amplitude and phase of the antenna elements. Consequently, continuously variable beamwidth of the antenna can be obtained under electronic control. A fully operational prototype was designed, fabricated, and tested to validate the proposed design. Measured results indicate that the overlapped -10 dB impedance bandwidth of the proposed antenna is 19.6% and the half-power beamwidth (HPBW) in the E-plane is capable of varying from 39° to 107° within the operating frequency band.
关键词： Beamwidth reconfigurable antenna,varactor diode,substrate integrated waveguide (SIW),magneto-electric (ME) dipole
更新于2025-09-23 15:19:57
-
Air-Filled Substrate Integrated Waveguide Fed Magneto-Electric Dipole Antenna Array for Millimeter-Wave Applications
摘要： A substrate integrated magneto-electric (ME) dipole antenna array with an improved radiation efficiency is presented in the 28-GHz band. A novel full-corporate air-filled substrate integrated waveguide (SIW) feed network with low losses is designed and realized by utilizing the low-cost printed circuit board (PCB) facilities. Different from most previous millimeter-wave planar arrays consisting of 2 × 2 sub-arrays, an SIW fed sub-array with a larger size of 2 × 4 is investigated to simplify the configuration of the major portion of the array feed network, which is of importance to the successful realization of the air-filled SIW feed network. An 8 × 8 array prototype with a four-layered geometry is fabricated and measured to verify the design. The array has an impedance bandwidth of 25.9%, a gain up to 26 dBi and stable radiation patterns over the operating band. Benefitted from the absence of the significant dielectric loss in the feed network, a high antenna efficiency of 80% is also achieved. The proposed design provides an effective method to improve the achievable gain and efficiency characteristics of the substrate-integrated arrays with a large size that are attractive for millimeter-wave wireless applications.
关键词： feed network,Antenna array,aperture-coupled magneto-electric (ME) dipole antenna,dielectric loss,millimeter-wave,air-filled substrate integrated waveguide (SIW)
更新于2025-09-11 14:15:04
-
A Ka-Band 3D-Printed Wideband Stepped Waveguide Fed Magneto-Electric Dipole Antenna Array
摘要： A novel millimeter-wave aperture-coupled magneto-electric (ME) dipole antenna with a low-profile metallic geometry is proposed based on the three-dimensional (3D) printing technology. An impedance bandwidth of 53.7%, a gain up to 10.8 dBi, and stable unidirectional radiation patterns with the cross polarization of less than -38 dB are achieved by the antenna. Its operating mechanism and design process are studied in detail as well. In order to widen the bandwidth of the millimeter-wave full-corporate H-plane air-filled waveguide feed network, a wideband H-plane stepped waveguide T-junction with a compact size is then investigated, which has a bandwidth of about 50% for the reflection coefficient of less than -20 dB. By combining the presented radiating element with the feed network, an 8 × 8 ME-dipole array is designed, printed and tested in the Ka-band. An enhanced bandwidth of 31%, symmetric radiation patterns with the cross polarization of less than -35 dB, and a gain varying from 25.5 to 28.5 dBi are obtained experimentally. The proposed design demonstrates the advantage of utilizing the 3D printing method to improve the operating characteristics of the millimeter-wave antenna array and is attractive for the emerging wideband millimeter-wave wireless applications.
关键词： stepped waveguide,wideband,Millimeter-wave,3D printing,magneto-electric (ME) dipole,high-gain
更新于2025-09-11 14:15:04
-
[IEEE 2018 IEEE International Conference on Computational Electromagnetics (ICCEM) - Chengdu, China (2018.3.26-2018.3.28)] 2018 IEEE International Conference on Computational Electromagnetics (ICCEM) - Polarization-Switchable Magneto-Electric Dipole
摘要： A polarization reconfigurable magneto-electric (ME) dipole antenna is presented. The ME dipole is fed by a pair of dipoles crossed through a 90° phase delay line. By controlling the state of the four p-i-n diodes that inserted in the crossed dipoles, the antenna can switch the polarization between LHCP and RHCP. A wide band and good radiation patterns can be realized by the proposed simple structure.
关键词： magneto-electric (ME) dipole,polarization reconfigurable
更新于2025-09-09 09:28:46
-
[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) - Wideband Millimeter-Wave End-Fire Magneto-Electric Dipole Antenna Fed by Substrate Integrated Coaxial Line
摘要： A wideband millimeter-wave magneto-electric (ME) dipole antenna with end-?re radiation, which is fed by the substrate integrated coaxial line (SICL), is designed, fabricated, and measured. First, the ME-dipole antenna excited by a planar L-probe is presented to realize wideband performance. Then, a wideband impedance conversion structure is used to connect the antenna and the feeding port. A simple conversion structure for the SICL to the grounded coplanar waveguide is used for the antenna test. Finally, the simulation and measurement results validate the proposed end-?re ME-dipole antenna. The overall bandwidth is greater than 40% considering both impedance bandwidth and 3-dB gain bandwidth.
关键词： wideband antenna,magneto-electric (ME) dipole antenna,substrate integrated coaxial line (SICL),end-?re
更新于2025-09-04 15:30:14