Dual-polarized, monostatic antenna array with improved Tx–Rx isolation for 2.4 GHz in-band full duplex applications

2020 ◽  
Vol 12 (5) ◽  
pp. 398-408 ◽  
Author(s):  
Haq Nawaz ◽  
Ahmad Umar Niazi ◽  
M. Abdul Basit ◽  
Furqan Shaukat ◽  
Muhammad Usman
Keyword(s):  
Antenna Array ◽  
Interference Cancellation ◽  
Single Layer ◽  
Full Duplex ◽  
Compact Antenna ◽  
Wireless Applications ◽  
Measurement Results ◽  
Phase Balance ◽  
Hybrid Coupler ◽  
Dual Polarized

AbstractThis paper presents a two-elements based, dual polarized, single layer, patch antenna array with improved isolation between transmit (Tx) and receive (Rx) ports for 2.4 GHz in-band full duplex (IBFD) or simultaneous transmit and receive wireless applications. The differential feeding deployed at the Rx port effectively suppresses the coupling which is termed as self-interference from the Tx port to achieve high Tx–Rx interport isolation. A simple 3 dB/180° ring hybrid coupler with nice amplitude and phase balance characteristics has been used for differential Rx operation. The mathematical description for a differential feeding based self-interference cancellation mechanism is also presented for the proposed dual polarized IBFD antenna array. The measurement results for the implemented prototype of the antenna array demonstrate very nice levels of Tx–Rx interport isolation. The implemented single layer, compact antenna array presents 10 dB return-loss bandwidth of more than 50 MHz for both Tx and Rx ports. The prototype achieves >80 dB peak interport isolation and 75 dB (65 dB) isolation in 20 MHz (50 MHz) bandwidth.

A compact, dual-polarized patch antenna with improved Tx–Rx isolation for 2.4 GHz single frequency full-duplex applications

2020 ◽  
pp. 1-8
Author(s):  
Haq Nawaz ◽  
Muhammad Abdul Basit ◽  
Ahmad Umar Niazi
Keyword(s):  
Interference Cancellation ◽  
Printed Circuit Board ◽  
Circuit Board ◽  
Full Duplex ◽  
Single Frequency ◽  
Impedance Bandwidth ◽  
Antenna Structure ◽  
Mode Operation ◽  
Hybrid Coupler ◽  
Dual Polarized

Abstract A compact dual-polarized monostatic antenna (single radiator for transmit and receive modes) is presented with differential receive mode operation to achieve excellent interport isolation for 2.4 GHz single frequency full-duplex or in-band full-duplex applications. The presented antenna comprises three ports radiating element (patch) and a simple 3 dB/180o ring hybrid coupler has been utilized for differentially excited receive mode operation. The 3 dB/180o ring hybrid coupler acts as a self-interference cancellation (SIC) circuit for effective suppression of RF leakage from the transmit port to provide very high interport decoupling between transmit and receive ports. A compact antenna structure has been realized by using two-layered printed circuit board through vias interconnections of both receive ports of the antenna with inputs of SIC circuit. The validation model of proposed antenna offers more than 95 dB peak interport isolation. Moreover, the experimentally measured interport isolation is better than 70 dB throughout the antenna's 10 dB return-loss impedance bandwidth (BW) of 50 MHz (2.38–2.43 GHz). Furthermore, the recorded isolation is more than 80 dB in 20 MHz BW. The implemented antenna has good radiation characteristics including nice gain and low cross-polarization levels as endorsed by measurements. Same antenna structure with microstrip-T feeds can provide DC isolated ports with same interport RF isolation performance for active antenna applications. Such antenna with DC interport isolation will avoid the requirements of additional series capacitors on transmit and receive ports of antenna.

High Port-to-Port Isolation Dual-Polarized Antenna Array Dedicated for Full-Duplex Base Stations

2020 ◽  
Vol 19 (7) ◽  
pp. 1098-1102
Author(s):  
Dariusz Wojcik ◽  
Maciej Surma ◽  
Artur Noga ◽  
Miroslaw Magnuski
Keyword(s):  
Antenna Array ◽  
Base Stations ◽  
Full Duplex ◽  
Dual Polarized ◽  
Dual Polarized Antenna

scholarly journals Single Layer, Differentially Driven, LHCP Antenna With Improved Isolation for Full Duplex Wireless Applications

IEEE Access ◽  
2019 ◽  
Vol 7 ◽  
pp. 169796-169806
Author(s):  
Haq Nawaz ◽  
Ahmad Umar Niazi ◽  
Muhammad Abdul Basit ◽  
Muhammad Usman
Keyword(s):  
Single Layer ◽  
Full Duplex ◽  
Wireless Applications

Circular and Dual Polarized Antenna for Self-Interference Cancellation in the Next Generation of Mobile Communication Networks

2021 ◽  
Vol 20 ◽  
pp. 18-27
Author(s):  
Mohamed B. El-Mashade ◽  
Ehab Α. Hegazy
Keyword(s):  
Wireless Communication ◽  
Interference Cancellation ◽  
Communication Systems ◽  
Single Channel ◽  
Full Duplex ◽  
Wireless Communication Systems ◽  
Next Generation ◽  
Fifth Generation ◽  
Resonance Frequencies ◽  
Dual Polarized

The interference phenomena is actually appeared in all current wireless communication systems. This problem has different forms and impacts the performance of any wireless system. At the present time, a new technology, that is called fifth generation (5G), of mobile communications knocks the doors to be commercial within few days. Conventional wireless communication systems use two separate channels, one channel to transmit and another to receive. Achieving single channel full duplex (FD) is one of the key challenges for 5G implementation. Single channel FD provides the capability of sending and receiving concurrently over the same channel, along with assuring efficient utilization of the available spectrum. With this newest technology, another sort of interference will be generated which is called self–interference (SI). SI cancellation techniques represent an awesome solution for the development of next generation. These techniques have two types: passive and active cancellation. Antenna cancellation approach can be characterized as a passive cancellation. In our proposed work, antenna with two feedings is employed as a cancellation procedure. A patch antenna is simulated and tested for two resonance frequencies, 2.45GHz and 28.0GHz. Both frequencies are candidates of frequency channel proposed by ITU for the fifth generation of mobile networks. Finally, the complete design and simulation of dual polarized, with series-fed 3 by 3 patch array on 3.3GHz, is provided.

scholarly journals Wideband Dual-Polarized Full-Duplex Antenna Array

2021 ◽  
Author(s):  
Hadi Hijazi ◽  
Marc Le Roy ◽  
Raafat Lababidi ◽  
Denis Le Jeune ◽  
Andre Perennec
Keyword(s):  
Antenna Array ◽  
Full Duplex ◽  
Dual Polarized
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