Compact directional diagram diversity co-frequency full duplex antenna

Abstract

The invention discloses a compact directional diagram diversity co-frequency full duplex antenna which comprises a first substrate, a second substrate, a receiving antenna and a transmitting antenna. The second substrate is arranged on a front surface of the first substrate, the centers of the second substrate and the first substrate are aligned; the receiving antenna is composed of a first feed port, a system floor, a radiation patch and a feed network, the transmitting antenna is composed of a second feed port, a system floor, a gap, a metal patch and a radiation patch, the radiation patch and the system floor are shared by the receiving antenna and the transmitting antenna, and miniaturization of the antenna is facilitated; meanwhile, the position of the first feed port excitation radiation patch is located in a weak current distribution area when the radiation patch is excited by the second feed port, and the position of the second feed port excitation radiation patch is located in a weak current distribution area when the radiation patch is excited by the first feed port so that other decoupling devices or units do not need to be introduced; and the receiving antenna and the transmitting antenna have high isolation.

Description

Technical field [0001] The present application relates to the field of RF communications, and in particular, to a compact direction diagram collection with the same frequency full-duplex antenna. Background technique [0002] Future Mobile Communications (5G and 6G) ​​has become a hotspot in global research, mobile Internet and Internet of Things as two major driving force for future mobile communications, and provides a broad application prospect for 5G and 6G. In the face of thousands of multiples of future data traffic, the business needs of 100 billion devices, and the design of 5G and 6G systems not only need to meet more flexible network deployment and more efficient operation and maintenance, but also significantly increase spectrum efficiency. Energy efficiency and cost efficiency. As one of 5G and 6G potential key technologies, the same frequency full-duplex technology has received extensive attention in recent years. At the same time, the same frequency duplex means tha...

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Problems solved by technology

[0006] In 2014, Professor Zhang Zhijun of Tsinghua University and others published an article entitled "A novel null scanning antenna using even and oddmodes of a shorted patch" on IEEE TRANSACTIONS ON ANTENNAS ANDPROPAGATION. A dual-port antenna designed by the model, the antenna can be used as a pattern diversity co-frequency full-duplex antenna, the receiving antenna and the transmitting antenna have a cone-shaped radiation pattern and an end-fire directional radiation pattern, respectively, through the reverse hybrid coupler Form a feeding network to achieve greater than 30dB isolation between the receiving antenna port and the transmitting antenna port, but the size of the antenna is relatively large, which is 120mm×100mm×6mm=72000mm 3 ;

[0007] In 2015, Professor Wu Wen of Nanjing University of Science and Technology published an article entitled "Wideband circular patch antenna for pattern diversity applications" on IEEE ANTENNAS AND WIRELESSPROPAGATION LETTER. The antenna disclosed in the article can be used as a pattern diversity co-frequency full-duplex antenna. The antenna excites the radiating patch TM respectively 11 Die and TM 01 The receiving antenna and the transmitting antenna have a conical radiation pattern and an end-fire directional radiation pattern respectively, and the isolation between the receiving antenna port and the transmitting antenna port is greater than 25dB, but the size of the antenna is relatively large, 200mm×200mm×20.626 mm=825040mm 3 ;

[0008] In 2016, Dr. Sun Li from Xidian University and others published an article entitled "A single patch antenna with broadside and conical radiation patterns for 3G / 4G pattern diversity" on IEEE ANTENNAS AND WIRELESSPROPAGATION LETTER, in which a dual-port Square patch antenna, the antenna can be used as a pattern diversity co-frequency full-duplex antenna, by exciting the TM of the patch antenna 01 Mode and capacitive loading pole-type radiation pattern, the transmitting antenna and receiving antenna have end-fire directional radiation pattern and pole-type radiation pattern respectively, by using a competitive feed network, the distance between the receiving antenna port and the transmitting antenna port The isolation is greater than 20dB, but the size of the antenna is relatively large, which is 160mm×160mm×18mm=460800mm 3 ;

[0011] In the existing technology represented by the above scheme, if no additional filtering unit, filter, decoupling unit or decoupling network is introduced, it is impossible to achieve small antenna size and high port isolation at the same time, especially low antenna size. profile, which is not conducive to the development of antenna miniaturization, and is not conducive to reducing the size of wireless communication systems

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