Low sidelobe microstrip array antenna with filtering characteristics
A microstrip array and low sidelobe technology, which is applied in the field of low sidelobe microstrip array antennas, can solve the problems of increasing the system volume and the antenna structure does not have filtering characteristics, etc., and achieves easy integration, low cost, and easy processing and manufacturing Effect
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[0029] Example 1
[0030] Such as Figure 1-Figure 4 As shown, a low sidelobe microstrip array antenna with filtering characteristics includes a dielectric substrate 1, a microstrip structure 2 formed by metal foil on the upper surface of the dielectric substrate, and a floor 3 formed by metal foil on the lower surface of the dielectric substrate, In this embodiment, the microstrip structure includes a feed port 211 for inputting electromagnetic signals, resonators 221-225, and patch radiation units 231-238. The resonators include first, second, third, fourth, and Five resonators 221-225, the feeding port and the first resonator 221 are fed in a coupling manner. The resonators 221-225 form a one-to-four power-dividing feed network. By controlling the first resonator 221 and the first resonator 221 The respective coupling strengths D1-D4 of the second to fifth resonators 222-225 then realize equal or unequal power distribution. The first to fifth resonators 221-225 are branch-loade
Example Embodiment
[0037] Example 2
[0038] Such as Figure 7 As shown, there are three resonators in this embodiment, including a first resonator 221, a second resonator 222, and a third resonator 223. The three resonators form a one-to-two power distribution network, and the patch radiation unit is four. One, the first resonator is coupled to the feed port 211, the second and third resonators form two one-to-two power distribution networks with the four patch radiating units 231-234, and the patch radiating unit 231- 234 are placed in a row.
[0039] The one-to-two power distribution network composed of three resonators is an equal division network, and the second and third resonators and the four patch radiating units form two one-to-two power distribution networks as unequal division networks.
[0040] Others are the same as in Example 1.
[0041] Figure 8 These are the |S11| and gain simulation results of the antenna of the embodiment. The 10dB reflection loss range and relative bandwidth of the an
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