Novel handset antenna

Abstract

The invention provides a novel handset antenna which comprises a radiation plate. A reflecting plate is placed below the radiation plate. Supporting foam is arranged between the reflecting plate and the reflecting plate. The reflecting plate is of a multilayer resonance structure. The radiation plate comprises a dielectric plate. Two metal rings are arranged on the upper surface of the dielectric plate, and coupling capacitance effect can be formed between the two metal rings. A matching zone is arranged on the dielectric plate below the metal rings. Parallel two-line feed and symmetrical matching resistance capacitance modes are used in the zone. Two copper paving pasting pieces are arranged at the portions, close to the bottom side, of the upper surface and the lower side of the dielectric plate. The two opposite copper paving pasting pieces are connected through a metallization via hole. The upper surfaces of parallel two lines are communicated with the two copper paving pasting pieces respectively. The two copper paving pasting pieces are connected with feeder lines in a welding mode. The novel handset antenna is small in size, the front-back ratio is good, the antenna is of the resonance structure which can restrain electromagnetism energy, antenna backward radiation is effectively lowered, the impedance bandwidth ratio is good, the antenna is made of FR4 materials, batch machining is easy, cost is low, and mounting is convenient.

Description

technical field [0001] The invention belongs to the communication field, and in particular relates to a novel handheld antenna, which can be used in radio frequency identification (RFID), indoor coverage and other civil communication fields. Background technique [0002] The current radio frequency identification (RFID) industry is developing very fast, and it has begun to be widely used in many fields such as transportation, logistics, and monitoring. RFID system consists of readers, reader antennas and tags. The reader transmits a signal to the tag, and the tag reflects the signal to the reader antenna, forming a complete communication link. In the communication process, since the tags are often placed in irregular positions, the reader antenna is required to be a circularly polarized antenna, which can effectively read tags placed at different angles and positions. The radiation electric field of the circularly polarized antenna is rotating, so that it can communicate w...

AI Technical Summary

Problems solved by technology

However, some existing RFID reader antennas are often large in size, which is not suitable for practical application scenarios.

Some of the current miniaturized antennas are mostly filled with thick dielectrics, or the method of increasing the dielectric constant of the substrate. These methods are often very expensive. Due to the large loss of the dielectric, the gain will be relatively low, and the front-to-back ratio of the antenna is not high. Very good, and the consistency of the thick plate is not good, not suitable for mass production and processing

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