Miniaturized dual-frequency antenna

Abstract

The invention provides a miniaturized dual-frequency antenna. The miniaturized dual-frequency antenna comprises a medium substrate and a monopole antenna printed on the medium substrate. The monopole antenna comprises a main radiating unit, a coplanar waveguide feeding signal strip line connected with the main radiating unit, coplanar waveguide ground planes and auxiliary radiating units arrangedbetween the main radiating unit and the coplanar waveguide ground planes. The main radiating unit is a U-shaped radiating unit, the lower end of the coplanar waveguide feeding signal strip line is connected with an inner conductor of SMA (Stone Matrix Asphalt), and an outer conductor of the SMA is connected with the coplanar waveguide ground planes. The invention can be used for receiving and transmitting radio waves. The invention can be used for terminals for electronic reconnaissance and electronic countermeasure and tracking and electromagnetic protection, wireless local area network and global microwave access terminal receiving equipment. The invention has the advantages of simple structure, wide operating bandwidth and low cost, and is convenient for mass produce.

Description

technical field [0001] The present invention relates to an antenna. Specifically, it is a miniaturized dual-band antenna that can be used to receive and transmit radio waves. Background technique [0002] As radio communication equipment and electronic information equipment are developing towards multi-function, miniaturization, ultra-broadband and friendly coordination with the surrounding environment, which makes broadband, miniaturization and high gain become one of the hot topics of research at home and abroad. In recent years, coplanar waveguide structures that do not require drilling and are easy to integrate are rapidly changing, and the structures can be fabricated by photographic or lithographic techniques and have better polarization characteristics, so this technology has been applied in the design of broadband antennas and related in the design of microwave circuit components. In most cases at present, a pair of antennas is required to meet the needs of multipl...

AI Technical Summary

Problems solved by technology

At the same time, solve some shortcomings of the existing dual-band antennas: (1) Most of the current dual-band antennas are in the form of monopole antennas and sleeve antennas, but the feeding methods of these antennas are relatively complicated, which is not convenient for actual debugging and production; (2) At present, most of the miniaturized dual-band antennas use the bending deformation of the monopole antenna, or use a non-planar structure, which brings certain difficulties to the design and installation of the system At the same time, it is not convenient to consider its electromagnetic compatibility characteristics, and because it adopts a non-planar structure, it is not convenient for system integration and miniaturization design; (3) Most of the current dual-band antennas have relatively narrow bandwidths, which cannot meet the current requirements. The broadband requirements of the equipment, generally each bandwidth is more than a few hundred megabytes, so it is necessary to design a dual-band antenna with a wider bandwidth; (4) In recent years, most of the antennas with dual-band Most of the antennas with special characteristics are in the form of multi-resonator elements, which generally increase the volume of the antenna and remain unchanged from the miniaturization design.

[0003] The literature "Electromagnetically coupled WLAN / WiMax antenna, M.Bashri, Ch.Ghobadi, M.Kamyab Hesari, and J.Nourinia, IEICE Electronics Express, Vol.7, No.13, 2010." proposed a dual frequency antenna, but the antenna still has a large volume and complex structure. Although the coupling method is used to generate dual-band bandwidth in this paper, the antenna adopts a double-sided coupling structure, which increases the complexity of the antenna, which is not conducive to the antenna and system integration

The document "Band-notched design of the planar monopole antenna for WLAN / WiMax applications, Kang-kang Chen, and Ji-xiang Zhao, Microwave And Optical Technology Letters, Vol.52, No.12, 2010" proposes to use etching on the radiation unit The method of rectangular slots realizes the characteristics of dual-frequency impedance bandwidth, but the size is large, and the oval ground plane design is adopted at the same time, which is inconvenient for debugging

The Chinese patent "Dual-frequency Slotted Antenna, Application No. 200510004103.6" describes a slotted dual-frequency antenna. The antenna adopts a structure of opening different slots in different resonant frequencies, and uses a coaxial cable to feed power at the same time, but the antenna's Bandwidth is limited and does not depend on antenna and system miniaturization and integration

The Chinese patent "Dual-frequency single dipole antenna, application number: 02102397.2" describes a laminated dual-frequency antenna design. This patent mainly prints different patch units on different dielectric layers, thereby generating different resonances point, but the structure of the antenna is relatively complex, and the bandwidth is relatively narrow, which cannot meet the current broadband communication requirements and the application of miniaturized integrated design

Chinese patent "dual-frequency printed antenna, application number: 200710154359.4", the dual-frequency antenna still adopts a laminated structure and perforated form to form dual-frequency characteristics, which not only increases the complexity of the antenna, but also causes some electromagnetic waves to be distorted due to perforation Leakage, which affects the radiation characteristics of the antenna

The document "Printed modified loopantenna for WLAN / WiMax applications, C.M.Peng, I.F.Chen, J.J.Yeh and C.W.Hsue, Electronics Letters, Vol.43, No.5, 2007" proposes a loop dual-band microstrip antenna, but the antenna The bandwidth is very narrow and cannot meet the needs of broadband communication

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