a slot antenna
A slot antenna and slot technology, which is applied to antennas, antenna grounding devices, electrical components, etc., can solve the problems of large occupation area, increased feeding network, complex structure, etc., and achieve a small occupation area, large change space, and simple structure. Effect
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Embodiment 1
[0028] Such as figure 1 , 2 A double-ring structure shown includes two lower metal strips 5, and an upper metal strip 6 corresponding to the lower metal strip 5, and the two ends of the upper metal strip 6 and the lower metal strip 5 respectively pass through The metal pillars 3 are connected to form two symmetrical parasitic rings, and the parasitic rings are provided with a switch tube for controlling the switching of the parasitic rings and a bias circuit for controlling the switch tube. The two lower metal strips are arranged in parallel. This double ring structure should be used in conjunction with the existing antenna structure. The lower metal strip 5, the upper metal strip 6, and the two metal posts 3 form a parasitic ring, and the two parasitic rings form a parasitic ring pair. The switch tube is controlled by a bias circuit. The on and off of the parasitic loop can be controlled to achieve the working state of the parasitic loop. Each parasitic loop is excited by ...
Embodiment 2
[0030] Based on the principle and structure of the above embodiment, this embodiment refines and optimizes the above structure. Specifically, the switching tube can be realized by using a PIN diode, and it is arranged in the middle of the upper metal strip 6 . It should be noted that those skilled in the art should know that the structure and position setting of the switching tube for realizing parasitic loop on-off control with other structures are within the scope of protection of this solution.
[0031] Such as Figure 4 As shown, the bias circuit can be implemented using the following circuit structure, including a plurality of capacitors connected in parallel, a first inductor connected to one end of the parallel capacitor, a second inductor and a resistor connected in series to the other end of the parallel capacitor. It should be noted that the structure of the bias circuit provided in this embodiment is only a preferred structure, and does not limit its protection scop...
Embodiment 3
[0035] The foregoing embodiments are applicable to antennas of any structure, and a slot antenna is used as an example in this embodiment.
[0036] Such as figure 1 , 2 , a slot antenna shown in 3, comprising a lower dielectric plate 2, an upper dielectric plate 1, a radiation slot 4 arranged on the lower dielectric plate 2, a double-ring structure of any of the above-mentioned embodiments, a lower metal strip 5, an upper metal The strips 6 are respectively arranged on the lower dielectric board 2 and the upper dielectric board 1 .
[0037]The lower dielectric board 2 and the upper dielectric board 1 can be double-layered dielectric boards to facilitate the printing of the metal strips, or can be welded in the air with the metal strips. In this embodiment, the structure of the double-layer dielectric board will be described in detail. The upper and lower surfaces of the lower dielectric board 2 are respectively provided with a metal floor 7 and a lower metal strip 5, the ra...
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