Design of a Miniaturized Log Periodic Dipole Antenna Using a T-loaded Structure with Dual-Polarization for Electronic Warfare Applications

2021 ◽  
Author(s):  
Sangwoon Youn ◽  
Tae Heung Lim ◽  
Hosung Choo
Keyword(s):  
Dipole Antenna ◽  
Dual Polarization ◽  
Electronic Warfare ◽  
Loaded Structure

scholarly journals Magnetoelectric Dipole Antenna with Dual Polarization and High Isolation

2018 ◽  
Vol 2018 ◽  
pp. 1-7
Author(s):  
Xujun Yang ◽  
Lei Ge ◽  
Dengguo Zhang ◽  
Chow-Yen-Desmond Sim
Keyword(s):  
Transmission Lines ◽  
Dipole Antenna ◽  
Cross Polarization ◽  
Radiation Patterns ◽  
Dual Polarization ◽  
High Isolation ◽  
Microstrip Lines ◽  
Directional Radiation ◽  
Dual Polarized ◽  
Coaxial Lines

A dual-polarized aperture-coupled magnetoelectric (ME) dipole antenna is presented in this paper. The feeding network is based on substrate-integrated coaxial lines (SICLs). To describe the effect of the SICL on improving the isolation, the ME dipole with another two different feeding configurations, microstrip lines and striplines, respectively, is compared. As such, the coupling between the transmission lines is tremendously reduced and the isolation between the two input ports of different polarization is enhanced. An antenna prototype is fabricated and tested, exhibiting good performances, including an isolation level of higher than 30 dB between the two input ports and gains of more than 9.5 dBi. Besides, the proposed design is capable of achieving stable directional radiation patterns with cross-polarization levels lower than −22 dB and back radiation levels lower than −24 dB.

scholarly journals Design of A Ka-Band 3D-Printed Dual-Polarization Magnetoelectric Dipole Antenna Array with Low Sidelobe

Electronics ◽  
2021 ◽  
Vol 10 (23) ◽  
pp. 2969
Author(s):  
Yikun Wang ◽  
Wenhao Tan ◽  
Kaiqiang Zhu ◽  
Hao Luo ◽  
Guoqiang Zhao ◽  
...  
Keyword(s):  
Antenna Array ◽  
Communication Systems ◽  
Three Dimensional ◽  
Dipole Antenna ◽  
Dual Polarization ◽  
Ka Band ◽  
Low Sidelobe ◽  
Cavity Structure ◽  
3D Printed ◽  
Laminated Structures

A Ka-band dual-polarization magnetoelectric (ME) dipole antenna array based on three-dimensional (3D)-printed technology with low sidelobe level (SLL) is proposed in this paper. The metal posts and cross-slots are explored to build a novel subarray with 2 × 2-unit ME-dipoles as the basic element. Creatively, a square waveguide to cross-slots transition with a pyramid horn cavity structure is investigated to feed the ME-dipole subarray. Furthermore, two types of power-tapering corporate-feed networks with laminated structures are used to design an 8 × 8-unit low-SLL array. The fabricated array has a relative bandwidth (VSWR < 2) of 14.3% and 17.1%, with a realized gain higher than 25.8 dBi and 26.1 dBi for the H-pol. and V-pol., respectively. The maximum radiation efficiency for both arrays is 73.2%. The measured first sidelobe levels are less than –17.5 dB for both polarizations. With competitive performance and low fabrication cost, the proposed dual-polarization ME-dipole antenna array would be valuable for polarization-agile radar and communication systems.

Design of miniaturized dual-polarized dipole antenna for 4G & sub-6 GHz 5G applications

Frequenz ◽  
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Anshul Agarwal ◽  
Pramod K. Singhal ◽  
Vandana V. Thakare
Keyword(s):  
Communication System ◽  
Return Loss ◽  
Dipole Antenna ◽  
Base Station ◽  
Open Loop ◽  
Impedance Bandwidth ◽  
Dual Polarization ◽  
Symmetric Structure ◽  
Base Station Antennas ◽  
Compact Size

Abstract Dual-polarization, enhanced gain and compact size is the basic need of the base station antennas whereas a modern communication system needs a wideband antenna which can cover both the LTE & 5G applications. In the present work, a cross dipole antenna is proposed for LTE & sub 6 GHz 5G frequency band for Base Station Antenna Applications. By introducing asymmetrically shaped pentagon slots in the dipole and open-loop dipole patches, wide impedance bandwidth of 1.65–4.05 GHz at a return loss of −14 dB are achieved for 4G & 5G applications. Two symmetric feeding lines orthogonal to each other have been used to obtain the dual-polarization. Also, a high stable gain of 7 ± 1 dBi & HPBW of 80 ± 5° was achieved over the entire operating band at both the ports due to the symmetric structure. The proposed antenna is compared for size and bandwidth with the structures already proposed in the literature and significant enhancement is observed to be used for Base station antennas.

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