scholarly journals Integrated Filtering Microstrip Duplex Antenna Array with High Isolation

2017 ◽  
Vol 2017 ◽  
pp. 1-8 ◽  
Author(s):  
Xian-Jing Lin ◽  
Ze-Ming Xie ◽  
Pei-Sheng Zhang
Keyword(s):  
Phase Shift ◽  
Transmission Line ◽  
Antenna Array ◽  
Cross Polarization ◽  
Polarization Ratio ◽  
Average Gain ◽  
High Isolation ◽  
Division Frequency ◽  
Synthesis Procedure ◽  
Bandstop Filters

This paper presents a 2 × 1 integrated filtering microstrip duplex antenna array with high isolation and same polarization. The antenna consists of two radiating patches fed by two T-shaped probes and a power distributing duplex network (PDDN). The PDDN is composed of two bandstop filters and a 180-degree phase shift power divider. And the PDDN is designed to achieve the functions of power division, frequency selectivity, and port isolation. A Transmission Line (TL) model is adopted to design the PDDN, and the detailed synthesis procedure is presented. For demonstration, the proposed antenna is designed and fabricated. The implemented antenna achieves an average gain of 10 dBi, a cross-polarization ratio of 20 dB, and an isolation of 35 dB within the operation band.

scholarly journals Four-Port Dual-Mode Diplexer with High Signal Isolation

2020 ◽  
Vol 2020 ◽  
pp. 1-5
Author(s):  
Jessada Konpang ◽  
Natchayathorn Wattikornsirikul
Keyword(s):  
Phase Shift ◽  
Transmission Line ◽  
Phase Shifter ◽  
High Signal ◽  
Dual Mode ◽  
High Isolation ◽  
Centre Frequency ◽  
Phase Cancellation ◽  
Signal Isolation

An ease of four-port dual-mode diplexer with high signal isolation is presented. A compact dual-mode diplexer with high signal isolation between the Rx and Tx modules is achievable by only using one resonator filter topology. Two back-to-back dual-mode diplexers have a 180° phase shift in one branch. The high isolation can be achieved by amplitude and phase cancellation technique. The delayed transmission line can be easily achieved by the phase shifter. The simulated and measured four-port dual-mode diplexers are designed at the centre frequency of Rx/Tx at 1.95 GHz and 2.14 GHz, respectively. The measured results of Rx/Tx dual-mode diplexer devices are presented with 47.1 dB Rx/Tx isolation. This four-port dual-mode diplexer achieves the isolation (S32) of more than 24.1 dB when compared with the conventional three-port dual-mode diplexer structure.

scholarly journals A Graphene-Assembled Film Based MIMO Antenna Array with High Isolation for 5G Wireless Communication

2021 ◽  
Vol 11 (5) ◽  
pp. 2382
Author(s):  
Rongguo Song ◽  
Xiaoxiao Chen ◽  
Shaoqiu Jiang ◽  
Zelong Hu ◽  
Tianye Liu ◽  
...  
Keyword(s):  
Antenna Array ◽  
Antenna Arrays ◽  
Multiple Input Multiple Output ◽  
Frequency Selective Surface ◽  
Antenna System ◽  
Antenna Element ◽  
Mimo Antenna ◽  
High Isolation ◽  
Input Multiple Output ◽  
Alternative Material

With the development of 5G, Internet of Things, and smart home technologies, miniaturized and compact multi-antenna systems and multiple-input multiple-output (MIMO) antenna arrays have attracted increasing attention. Reducing the coupling between antenna elements is essential to improving the performance of such MIMO antenna system. In this work, we proposed a graphene-assembled, as an alternative material rather than metal, film-based MIMO antenna array with high isolation for 5G application. The isolation of the antenna element is improved by a graphene assembly film (GAF) frequency selective surface and isolation strip. It is shown that the GAF antenna element operated at 3.5 GHz has the realized gain of 2.87 dBi. The addition of the decoupling structure improves the isolation of the MIMO antenna array to more than 10 dB and corrects the antenna radiation pattern and operating frequency. The isolation between antenna elements with an interval of 0.4λ is above 25 dB. All experimental results show that the GAF antenna and decoupling structure are efficient devices for 5G mobile communication.

Enhanced cross-polarization isolation of loop-dipole antenna array backed by dielectric cavities for 5G base stations

2021 ◽  
pp. 1-17
Author(s):  
Yiran Da ◽  
Xiaoming Chen ◽  
Mengting Li ◽  
Zhenyuan Zhang ◽  
Azremi Abdullah Al-Hadi ◽  
...  
Keyword(s):  
Antenna Array ◽  
Dipole Antenna ◽  
Base Stations ◽  
Cross Polarization
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