A miniaturized helical pifa antenna in uhf frequency band

A helical and antenna technology, applied in the field of PIFA antennas, can solve the problems of limited miniaturization ability and achieve the effect of compact antenna structure

CN103594786BActive Publication Date: 2017-05-10SPACE STAR TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2017-05-10

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Abstract

The invention discloses a miniaturization spiral PIFA antenna with an UHF band. The PIFA antenna comprises a metal patch (1), a metal floor (2), a metal feed probe (3), a metal needle (4) and an intermediate medium substrate (5). The metal patch (1) is in an evenly spaced spiral surrounding form. Evenly spaced spiral deformation of the PIFA antenna is utilized, so the overall length of the metal patch of a spirally surrounding shape is 0.25 times of wave length, the electrical length (referring to 0.25 times of wave length) of the PIFA antenna can be guaranteed, meanwhile the structure of the antenna is more compact, and subminiaturization of the PIFA antenna is realized.
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Description

technical field

[0001] The invention relates to the technical field of antennas, in particular to a PIFA antenna formed by helically wrapping metal microstrip lines at equal intervals. Background technique

[0002] Microstrip patch antennas have the advantages of beam width, miniaturization, low profile, and easy conformality. The PIFA (Planar Inverted F Antenna) antenna is a miniaturization solution of the patch antenna (the electrical length is generally about 0.25 times the wavelength). When working in the UHF frequency band, the PIFA antenna is still not small enough due to the long wavelength. At present, the miniaturization design of PIFA antennas is flourishing, and each method has its own characteristics. It is also indispensable for the current application of microstrip patch antennas, making it widely used in satellite communications, navigation, and data transmission.

[0003] Domestic and foreign documents such as the Chinese patent "Miniature PIFA Reconfigurabl...

Examples

Embodiment Construction

[0012] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0013] like figure 1 and figure 2 As shown, a miniaturized helical PIFA antenna in the UHF frequency band of the present invention includes a metal patch 1 , a metal floor 2 , a metal feeding probe 3 , a metal needle 4 and an intermediate dielectric substrate 5 . The metal patch 1 is located on the uppermost layer of the antenna, and is in the form of an equidistant helical winding, which is used to realize the electromagnetic radiation of the antenna; the metal floor 2 is located on the lowermost layer; the metal feeding probe 3 and the metal needle 4 respectively pass through the intermediate medium substrate 5. Connect the metal patch 1 and the metal floor 2 vertically; the metal feeding probe 3 is used to realize the feeding of the antenna; the metal pin 4 is used to realize the short circuit.

[0014] The intermediate dielectric subs...