Obliquely power feeding Bluetooth chip antenna

Abstract

Disclosed is an italic feeding Bluetooth chip antenna, which comprises an impedance inverter (4), a radiating element (5) and a dielectric substrate (6), and is characterized in that: the front end of the radiating element (5) adopts the impedance inverter (4) with an italic structure, and the radiating element (5) adopts a flexural shape; the impedance matcher (4) is composed of a lateral micro-strip line (4b) on top and a pair of italic micro-strip lines (4a, 4c) on bottom; and the antenna adopts the extreme compact italic structure as the impedance matcher and the flexural radiating element, so the Bluetooth chip antenna has advantages of good radiation effects, rather small size and compact structure, and can be properly applied to various short distance communication modules and systems.

Description

technical field [0001] The invention relates to a microwave chip antenna, in particular to a bluetooth chip antenna. Background technique [0002] Reducing circuit size is an important topic in modern microwave circuit design, and antennas are no exception. Especially with the rapid development of modern wireless communication technology, the requirements for antenna technology are getting higher and higher. Various external dipole antennas have been replaced by various built-in Replaced by antenna, LTCC (low temperature co-fired ceramic) technology can greatly reduce the line size due to the low cost, light weight, and low loss multilayer dielectric board technology. With the development of LTCC technology, more and more microwave circuits are used. Integrated into the LTCC multilayer dielectric board, a chip-level integrated circuit is formed, and the dielectric chip antenna is also developed accordingly. [0003] LTCC technology can be well applied in modern microwave ci...

AI Technical Summary

Problems solved by technology

[0005] The problem with most existing chip antennas is that they are too large or have low radiation efficiency

The Chinese utility model patent "A LTCC Multilayer Ceramic Antenna" with the patent number ZL200720107762.7 proposes a multilayer ceramic antenna. The layer current direction is opposite in the horizontal direction, but the vertical dimension is very short, so the radiation efficiency of the whole antenna is not high; the Chinese utility model patent "a meandering linear LTCC dual-frequency chip antenna" with the patent number ZL200720049216.2 proposes A zigzag linear chip antenna has higher radiation efficiency than the "multi-layer LTCC ceramic antenna". The antenna uses a double-L impedance matching unit. The double-L structure will produce many unnecessary bends, which will affect the current propagation.

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