Dual-frequency planar microstrip antenna
A microstrip antenna and microstrip line technology, which is applied to antennas, independent antenna unit combinations, and devices that make antennas work in different frequency bands at the same time, can solve the problem of reducing radiation efficiency, narrow frequency band, and performance easily affected by substrate materials. And other issues
Active Publication Date: 2013-12-18
RICHWAVE TECH CORP
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Problems solved by technology
Compared with antennas generally used to transmit microwaves, microstrip antennas are light and thin, deformable, easy to attach to printed circuits, easy to form a single component with power supply and circuits, form a uniform or multi-main beam radiation pattern, and apply to dual-frequency However, it also has the disadvantages of narrow frequency band, easy to face dielectric loss and reduce radiation efficiency, low applied power, and performance easily affected by substrate materials.
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[0029] In order to meet the requirements of the dual-frequency characteristic, high gain and wide-area radiation field of the microstrip antenna, the invention discloses a dual-frequency antenna. The dual-band antenna is mainly divided into a first part, a second part, and a joint part for coupling between the antenna arrays. Among them, the shape of the first part includes an L shape, and its embodiment part is implemented in a rectangular shape; the shape of the second part includes a curved shape, and its embodiment part is implemented in an arrow-shaped streamline shape. The dual-band antenna includes two resonant frequencies, one of which is determined by the length of the dual-band antenna, such as the length of the rectangular antenna shown later. The slot hole shown after the second part is related to another resonant frequency. The dual-band antenna can be, for example, a microstrip antenna.
[0030] In design, the curved surface of the arrow-shaped microstrip anten...
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In order to meet the requirements of a microstrip antenna on double operation frequencies, high gain and wide radiation field type, the invention provides a dual-frequency planar microstrip antenna using an antenna array, wherein the antenna array comprises a rectangular microstrip antenna and an arrowheaded microstrip antenna. A first resonance frequency is determined by the length of the rectangular microstrip antenna. A slot is opened on the rectangular microstrip antenna so as to satisfy a second resonance frequency. The curved surface of the arrowheaded microstrip antenna is designed according to an elliptic equation, so as to ensure resonance both at the first resonance frequency and at the second resonance frequency and form the wide radiation field type. A T-shaped joint part allocates the power between the antenna arrays by using the output impedance of the antenna array. An L-shaped band elimination filter on the T-shaped joint part is also used for restricting the resonance of the frequency multiplication of the first resonance frequency.
Description
technical field [0001] The present invention relates to a microstrip antenna, in particular to a dual-frequency planar microstrip antenna. Background technique [0002] A microstrip antenna is an antenna produced by adding a conductor sheet to a dielectric substrate with a conductor ground plane. The microstrip antenna can be implemented with wires such as microstrip lines or coaxial lines to generate a radio frequency electromagnetic field between the conductor sheet and the grounding plate, and make the radio frequency electromagnetic field diffuse outward through the gap between the conductor sheet and the grounding plate. Generally, the thickness of the dielectric substrate used in the microstrip antenna is much smaller than the wavelength of the corresponding resonant frequency, so when applied to a wireless communication device, the volume occupied by the wireless communication device can be greatly reduced. The conductor sheets attached to the microstrip antenna are ...
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IPC IPC(8): H01Q13/08H01Q21/30H01Q1/36H01Q5/01H01Q5/10
Inventor 邓维康毛绍纲陈秀莉吴民首阙郁智叶人郡
Owner RICHWAVE TECH CORP