Difference slit MIMO (Multiple Input Multiple Output) antenna with high common mode rejection ratio
A high common-mode suppression and slot technology, which is applied to antennas, devices that make antennas work in different frequency bands at the same time, and radiating element structures, etc. The effect of high common mode rejection ratio
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Embodiment 1
[0031] Such as figure 1 and figure 2 As shown, the antenna unit of this embodiment includes a floor and a microstrip feeder 1, the floor is arranged on the top layer of the dielectric substrate 2, and a T-shaped slot 3 is etched, and the microstrip feeder 1 is arranged on the bottom layer of the dielectric substrate 2;
[0032] The microstrip feeder 1 has a concave structure, and the two ends of the concave structure are respectively a first feeding port Port1 and a second feeding port Port2, and the first feeding port Port1 and the second feeding port Port2 are located at At the same edge of the bottom layer of the dielectric substrate, from figure 2 It can be seen from the figure that, unlike the traditional differential feed, the first feed port Port1 and the second feed port Port2 of the differential feed in this embodiment are directly connected, and the first feed port Port1 and the second feed port The electrical port Port2 feeds in differential signals with the sam...
Embodiment 2
[0035] Such as Figure 4 and Figure 5 As shown, the MIMO antenna of the present embodiment includes four antenna units (the antenna units of the above-mentioned embodiment 1) and a dielectric substrate 2, wherein the dielectric substrate 2 adopts an FR4 dielectric substrate with a dielectric constant of 4.4 and a thickness of 0.8mm; The three antenna units are the first antenna unit 4, the second antenna unit 5, the third antenna unit 6 and the fourth antenna unit 7. There are eight feeding ports in total. The floors of the four antenna units are connected and printed on the FR4 medium The top layer of the substrate; the microstrip feeder 1 of the four antenna units uses a 50Ω microstrip feeder and is printed on the bottom layer of the FR4 dielectric substrate, and uses the feed port to differentially feed the T-shaped slot 3 on the floor; the T of the four antenna units The rectangular slits 3 are arranged orthogonally to each other on the connected floor, and four rectangu...
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