4*4 broadband microstrip differential antenna array

Abstract

The invention discloses a 4*4 broadband microstrip differential antenna array, which comprises eight waveguide E-plane power dividers, seven waveguide H-plane power dividers and a 4*4 microstrip differential antenna array, wherein a rectangular patch and two pairs of lambda / 4 resonator capacitors are coupled to form a microstrip differential broadband antenna basic unit, and a 4*4 microstrip differential broadband antenna array is formed on the H surface and the E surface at equal intervals. The waveguide E-plane power dividers provide equal-amplitude reverse differential feed for the 4*4 microstrip differential antenna array. The waveguide H-surface power dividers connect the eight waveguide E-surface power dividers together to form single-port feed, the 4*4 microstrip differential antenna array is connected with the waveguide E-surface power dividers and the waveguide H-surface power dividers through coaxial probes, and the performance of low cross polarization is achieved. The 4*4 microstrip differential broadband antenna array is wide in frequency band, low in side lobe, low in cross polarization, integrated in design and stable in performance.

Description

technical field [0001] The invention relates to the field of microwave and millimeter wave antennas, in particular to a 4×4 broadband microstrip differential antenna array. Background technique [0002] With the rapid development of wireless communication systems, antennas, as devices for transmitting and receiving electromagnetic waves, have gained a pivotal position, and the requirements for antennas are getting higher and higher. Today, the 5G era has arrived, there are multiple communication modes in space, and the available spectrum is becoming more and more crowded, which leads to stronger interference between systems. At the same time, the data transmission rate used for communication is accelerated, the operating frequency is increased, and people have put forward higher requirements for the communication quality of the signal. For our designers, how to effectively suppress external electromagnetic interference has become an urgent problem to be solved at a higher o...

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Problems solved by technology

[0003] In 2013, Che Wenquan's team proposed the use of multi-layer printed circuit board technology to realize a 2×2 patch antenna array with low cross-polarization and broadband performance. This antenna uses a directional coupler to feed four single ports The unit is fed, and the cross-polarization of the E plane and the H plane is -27dB and -30dB respectively, but this antenna adopts a double-layer structure, which has the disadvantages of high side lobe and high cost, and this antenna has relatively high requirements for processing and manufacturing. high

In 2013, Xue Quan's team proposed a new broadband differential feed high-order mode patch antenna. This antenna feeds the patch antenna in a back-to-back manner through coaxial feeding. The differential signal is provided by the waveguide power supply structure, but this antenna Large and difficult to organize

In 2018, Liu Qianwen proposed a broadband thin differential patch antenna with SIW cavity. The antenna is composed of a resonant patch and SIW. The differential structure is fed by two symmetrical coaxial probes to the patch antenna. The bandwidth of this antenna is Reached 11.43%, with a low profile, but the sidelobe of this antenna is high, about -6dB, and it is not easy to form an array

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