Low profile broadband high gain filter antenna

Abstract

The invention discloses a low profile broadband high gain filter antenna. The antenna comprises an irradiator, an upper dielectric substrate, a lower dielectric substrate; a micro strip feed line with open-stub, a floor with a plurality of spaced slits and a metalizing via hole. The irradiator produces a resonance oscillation to provide broadband and high gain radiation band, at the same time, the roll-off at the upper edge of the belt can be adjusted by adjusting the size of the irradiator; the open-stub produces a radiation zero point to restrain high frequency resonance of antenna; the plurality of spaced slits restrain low frequency resonance of antenna; the metalizing via holes are connected with the micro strip feed line and the floor to generate radiation zero point to prolong the roll-off at the lower edge of the belt. The antenna provided by the invention has simple structure, and has the advantages of low profile, wide band, high gain, no complicated filtering circuit, low antenna loss, high efficiency, and wide stopband, so that harmonic suppression can be realized.

Description

technical field [0001] The invention relates to the field of wireless communication antennas, in particular to a low-profile broadband high-gain filter antenna. Background technique [0002] In wireless communication systems, multifunctional circuit modules have attracted widespread attention due to their small size and good overall performance. Antennas and filters are two integral components of an RF front end. Usually, the antenna and filter are designed independently as two components, and then they are matched to the 50 W standard port respectively, and then the two are cascaded. In this way, the size of the entire module increases, which is unfavorable for a radio frequency front-end with limited space. And because the bandwidths of the filter and the antenna are often not exactly the same, the filtering effect is affected. To overcome these problems, filter and antenna integration as a module is proposed. [0003] Most of the integration schemes of filters and ant...

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Problems solved by technology

Although the collaborative design of the filter and antenna improves the module performance to a certain extent, the loss of the filter is unavoidable, especially for broadband design, when multi-order resonators are required, the loss is often more serious, and the antenna gain is relatively low. Low

[0004] At this stage, there are few antenna designs that can have good filtering effect and harmonic suppression without using complex filtering circuits

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