Microstrip antenna for short-range communication
A short-range communication, microstrip antenna technology, applied in the direction of antenna, slot antenna, radiating element structure, etc., can solve the problems of large heat generation, narrow bandwidth, large size of dielectric substrate, etc., to achieve simple structure and cost saving , the effect of easy integration
Inactive Publication Date: 2009-09-09
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology
Although this kind of inverted F antenna can be used in short-range wireless communication, especially in the body-centered network, but in the low dielectric constant (ε r =3.15), its dielectric substrate size is large, and the efficiency of the antenna system is low
For radio frequency integrated circuits, in order to avoid the interference caused by the radiation of the circuit itself, and to reduce the size of the circuit, it is necessary to use a dielectric material with a high dielectric constant as the circuit substrate. Under a high dielectric constant, the bandwidth of the antenna becomes narrower. If it is less than 3%, it becomes very difficult to maintain a wide enough bandwidth, and it is difficult to meet the requirements of the Bluetooth frequency band
[0007] At present, the main problems of microstrip antennas are narrow bandwidth and low efficiency, especially as the dielectric constant of the substrate increases, the bandwidth is more difficult to guarantee, the efficiency is very low, and the heat generation is large
Method used
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[0016] refer to figure 1 , represents a schematic structural diagram of a planar inverted-F antenna in the prior art. figure 2 It is a schematic diagram of the miniaturized dish-shaped radiating antenna of the present invention. In the figure, 1 is the ceramic substrate, 2 is the dielectric layer, 3 is the connection point of the feed source, and 4 is the conductive copper film. The 16 points A-P in the figure are based on the center of the antenna panel as the origin to establish a rectangular coordinate system. The coordinates of each key point on the antenna are (in millimeters): A(-9.3, -6.9), B(-8.1, 5.7) , C (4.5, 6.9), D (2.7, 4.5), E (-6.9, 4.5), F (-4.5, 4.5), G (-5.7, 2.7), H (-4.5, -2.2), I ( 2.1, -0.9), J (3.3, -0.9), K (3.3, 0.9), L (4.5, 2.1), M (-3.3, -0.9), N (-3.3, 0.9), O (-2.1, 0.9), P(-0.9, 3.3). In the middle part of the antenna, points M and K are connected to the coaxial feeder.
[0017] image 3 and Figure 4 They are the schematic diagram of th...
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The invention relates to a microstrip antenna for short-range communication, belonging to the field of radio communication device. The microstrip antenna for short-range communication comprises an antenna panel and a coaxial feeding of a rectangular right-angled clearance structure made of a medium base plate coated by cuprum on a single surface. The microstrip antenna for short-range communication employs disk-type radiation antenna panel structure of microminiaturized area. The ceramic medium base plate coated by cuprum on a single surface has small exclusion to human body. The designed disk-type panel-structure microstrip antenna is extremely small, and the microstrip antenna is simple in structure and easy to process, and the microstrip antenna facilitates integration with an active circuit. The designed disk-type microstrip clearance antenna is smaller than existing inverted F-shaped microstrip antenna by approximately 95% in term of area. The microstrip antenna for short-range communication can not only save cost, but also provide possibility of usage in human central network system and function in organ repair by imbedding antenna in body.
Description
technical field [0001] The invention belongs to the field of wireless communication equipment, and in particular relates to a microstrip antenna applied to short-distance communication. Background technique [0002] Antenna is an important radio device for transmitting and receiving electromagnetic waves. The radio frequency signal power output by the radio transmitter is sent to the antenna through the feeder (cable), and is radiated by the antenna in the form of electromagnetic waves. After the electromagnetic wave propagates to the receiving location, it is received by the antenna and sent to the radio receiver through the feeder. There are many types of antennas, and the types of antennas used are also different for different frequencies, different purposes, different occasions, and different requirements. [0003] In the body-centered network system, the antenna plays an extremely important role. The selection of the antenna is mainly based on the requirements of net...
Claims
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Inventor 张金玲吕英华郑占奇张洪欣李莉韩宇南李蓉蓉
Owner BEIJING UNIV OF POSTS & TELECOMM