A three-mode zero-point frequency-sweep antenna
A frequency sweep and antenna technology, applied in antennas, resonant antennas, electrical short antennas, etc., can solve the problem that ordinary microstrip patch antennas do not have zero-point frequency sweep, etc., and achieve the effect of easy production, small size and low profile.
Active Publication Date: 2019-11-26
NANJING UNIV OF POSTS & TELECOMM
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The passive positioning it belongs to is to directly use the electromagnetic waves emitted by the target to determine the position information of the target, but the frequency range of the current interference signal is constantly expanding, which puts forward higher requirements for the miniaturization of the direction finding antenna
[0003] Microstrip patch antennas are the most widely used antennas in microwave systems. In addition to array antennas that can realize wide beam scanning, ordinary microstrip patch antennas do not have zero-point frequency sweep function
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[0020] In order to better understand the content of the patent of the present invention, the technical solution of the present invention will be further described below in conjunction with the drawings and specific embodiments.
[0021] Such as Figure 1-2 As shown, a three-mode zero-point frequency-swept antenna includes a sector-shaped planar magnetic dipole 2 and a parasitic sector-shaped magnetic dipole 3 arranged on a dielectric substrate 1, and two rectangles are symmetrically arranged on the sector-shaped planar magnetic dipole 2 Slot 4, utilize fan-shaped planar magnetic dipole 2 to add short-circuit nail and open rectangular slot 4. The shorting nails include a first shorting nail 5 , a second shorting nail 6 and a third shorting nail 7 .
[0022] The fan-shaped planar magnetic dipole 2 is a non-closed structure, including the first fan-shaped patch and the dielectric substrate 1 and the vertical short-circuit wall 9 connecting their straight sides, and two symmetric...
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The invention discloses a three-mode zero-point frequency-sweep antenna, which belongs to the field of Internet of Things and microwave technology, and comprises a fan-shaped plane magnetic dipole arranged on a dielectric substrate, and a rectangular shape is arranged symmetrically on the fan-shaped patch of the fan-shaped plane magnetic dipole. Slot; the fan-shaped planar magnetic dipole is fixed on the dielectric substrate by the second short-circuit nail and the third short-circuit nail, the opening angle of the fan-shaped planar magnetic dipole is the first central angle, and the third short-circuit nail is two and symmetrically arranged on The two sides of the angle bisector of the first central angle form three resonance points after matching. The invention can produce three resonance points by adding short-circuit nails and slots through sector-shaped magnetic dipoles while using a planar structure, and the zero point can be significantly changed according to the frequency, so as to achieve the effect of wide-angle scanning, and the antenna is small in size , simple structure, low profile, wide-angle scanning of frequency can be realized without additional complex phase-shifting power distribution network, and has broad application prospects in various wireless sensing and various radio frequency identification systems of the Internet of Things.
Description
technical field [0001] The invention belongs to the field of Internet of Things and microwave technology, and in particular relates to a three-mode zero-point frequency-sweep antenna. Background technique [0002] In recent years, with the continuous development of wireless communication technology, radio direction finding technology is also developing continuously. Radio direction finding is to use the direction characteristics of the direction finding antenna to measure the incoming wave direction according to the difference in the received signal amplitude of incoming waves from different directions. The passive positioning that it belongs to is to directly use the electromagnetic waves emitted by the target to determine the position information of the target, but the frequency range of the current interference signal is constantly expanding, which puts forward higher requirements for the miniaturization of the direction finding antenna. [0003] The microstrip patch ante...
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IPC IPC(8): H01Q1/38H01Q9/16H01Q1/50H01Q5/10H01Q5/28H01Q5/314H01Q5/321H01Q1/12
CPCH01Q1/38H01Q9/16H01Q1/50H01Q5/10H01Q5/28H01Q5/314H01Q5/321H01Q1/12H01Q5/364H01Q1/36H01Q9/0421H01Q9/0442H01Q3/22H01Q9/285
Inventor 吕文俊李司杰邵芸王见远吴汉赵志宾吴志芳李小慧朱洪波
Owner NANJING UNIV OF POSTS & TELECOMM