Double-band filter antenna with anti-interference feature
A filter and antenna technology, applied in the direction of antenna, antenna coupling, resonant antenna, etc., can solve the problem of no dual-frequency band filter antenna research, etc., achieve good out-of-band suppression characteristics, and isolate the effect of out-of-band signal interference
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[0019] The present invention will be further described below in conjunction with specific examples and accompanying drawings.
[0020] like Figure 1 to Figure 4 As shown, the present invention provides a dual-frequency filter antenna with anti-interference characteristics, which is composed of a monopole antenna and a dual-frequency filter, and is printed on the front of the dielectric substrate 1 as a whole; wherein the monopole antenna includes A monopole 4, the top of the monopole 4 is loaded with a rectangular ring 6 that is symmetrical along the monopole axis, and the middle of the monopole is loaded with two semicircular rings with an inner diameter R that are symmetrical along the monopole axis, one of which is The circular ring is a split ring 7 with an opening angle of α, and the other semi-circular ring is a closed ring 6, and the opening of the split ring 7 is upward; the lower end of the monopole antenna is connected to the filter output terminal at the top of the...
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