An ultra-wideband differential PIFA antenna suitable for 5G communication

An ultra-wideband and differential technology, applied in the field of 5G communication, can solve problems such as low linearity and poor signal anti-interference ability, and achieve the effects of suppressing cross-polarization, outstanding anti-interference ability, and stable impedance matching

Active Publication Date: 2022-02-01
HANGZHOU DIANZI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most current antenna engineers use single-port feed when designing broadband antennas, which will cause defects such as poor anti-interference ability and low linearity of the signal. On the contrary, these problems can be avoided by using differential feed, and The differential antenna can also be directly connected to the RF front-end differential circuit, effectively avoiding the use of the balun converter

Method used

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  • An ultra-wideband differential PIFA antenna suitable for 5G communication
  • An ultra-wideband differential PIFA antenna suitable for 5G communication
  • An ultra-wideband differential PIFA antenna suitable for 5G communication

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Embodiment Construction

[0035] The present invention is further analyzed below in conjunction with specific examples.

[0036] Combining Figure 1(a) and Figure 1(b), the ultra-wideband differential PIFA includes a dielectric substrate (1), two symmetrical radiating metal patches (2), and a feeding microstrip line (6). Two identical radiating patches (2) are located on the upper surface of the dielectric substrate (1), and are connected axially symmetrically with respect to the center line of the dielectric substrate. Two identical feeding microstrip lines (6) are located on the lower surface of the dielectric substrate (1), are connected axially symmetrically with respect to the center line of the dielectric substrate, and have an included angle (7) of 90° at the corner.

[0037] The dielectric substrate (1) is made of Rogers 5880 material, with a relative permittivity ε r It is 2.2, the loss tangent tanδ is 0.0009, and the thickness h is 0.787mm. The length l of the dielectric substrate (1) is 50 ...

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Abstract

The invention discloses an ultra-wideband differential PIFA antenna suitable for 5G communication. In the present invention, the original two independent PIFA antennas are directly connected through the ground port, and the single-port feed is changed into a dual-port differential feed, so as to provide a pair of signals with opposite polarities for the antenna, thereby generating High-frequency current with equal amplitude and reverse direction. At the same time, the continuity of the characteristic impedance of the microstrip is effectively controlled by using the method of bending the conduction band at a right angle with a 45° outer bevel, and a gradual slotting design is carried out on the radiation patch to meet the ultra-broadband characteristics. The differential mode loss in the passband of the present invention is small. After testing, it is found that the differential mode standing wave ratio of the differential antenna at 2-5.4GHz is less than 1.7, and the return loss is greater than 12dB, and the relative bandwidth is greater than 90%. In addition, the gain of the antenna in the working frequency band is greater than 5dBi, the radiation efficiency is greater than 95%, and it has properties such as ultra-wideband, high gain, high efficiency, and excellent port matching.

Description

technical field [0001] The invention belongs to the technical field of 5G communication, and relates to a mirror symmetrical PIFA antenna in a differential feeding mode, which can be used as a miniaturized antenna for the radio frequency front end of a wireless transceiver, and is widely used in wireless communication frequency bands such as ISM frequency bands, mobile communication frequency bands, and satellite communication frequency bands. middle. Background technique [0002] In recent years, with the rapid development of 5G communication technology, antennas need to cover more frequency bands and the corresponding bandwidth needs to be wide enough. At the same time, radio frequency modules are gradually developing towards miniaturization. For antenna workers, not only the performance of the antenna itself, but also the volume, power consumption and practicality of the entire radio frequency system need to be considered when designing the antenna. performance. However...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q1/38H01Q1/50H01Q5/35H01Q13/10
CPCH01Q1/38H01Q1/50H01Q5/35H01Q13/10
Inventor 天烁耿友林尹川
Owner HANGZHOU DIANZI UNIV
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