Filtering patch antenna without additional arrangement of filter circuit, and adjustment method thereof

• Main Authors: ZHANG XIUYIN, PAN YONGMEI, DUAN WEN, MO TE
• Format: Patent
• Language: English
• Published: 18.11.2015
• Subjects: ANTENNAS, i.e. RADIO AERIALS; BASIC ELECTRIC ELEMENTS; ELECTRICITY

The invention discloses a filtering patch antenna without additional arrangement of filter circuit, and an adjustment method thereof. The antenna comprises a bottom metal reflection floor, an intermediate feed patch and a top parasitic patch. The two sides of the feed patch are each provided with a short circuit probe, the feed patch is provided with a U-shaped groove, a short circuit probe is arranged in front of an opening of the U-shaped groove, and a feed point is arranged behind a closing position of the U-shaped groove. The top parasitic patch is fixed right above the feed patch at an interval of a certain height. According to the invention, the filtering patch antenna itself has a filtering function and realizes a bandpass filtering characteristic without additional arrangement of the filter circuit. The passband edge is deep, the sideband suppression is obvious, the frequency selectivity is good, adjacent frequency interference can be inhibited, the bandpass filtering characteristic and an antenna radiation function are integrated together, the plat grain at a passband position is quite high, and the filtering patch antenna is applied to such mobile communication scenes as WCDMA, 4G-LTE, WLAN and the like.