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Ultra wideband differential antenna with reconfigurable trapped wave

An ultra-wideband and antenna technology, applied in the field of ultra-wideband differential antennas, can solve the problems of increased communication system cost, low antenna gain, large antenna size, etc., and achieve the effect of compact structure, small size, and easy control

Active Publication Date: 2017-11-24
XIDIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In 2006, Nikolay and other scholars published the article Planar Differential Elliptical UWB AntennaOptimization in IEEE TRANSACTIONS ON ANTENNASAND PROPAGATION, the top journal in the antenna field, but the antenna gain is low
However, since the aforementioned literature still uses two antennas to achieve differential characteristics, the size of the antenna is still relatively large
In addition, since the operating frequency of the notch center of the antenna described in the aforementioned literature is fixed, it is not possible to flexibly and selectively trap a certain frequency individually according to needs. Therefore, when the required notch center operating frequency changes, the antenna needs to be redesigned. thus increasing the cost of the communication system

Method used

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  • Ultra wideband differential antenna with reconfigurable trapped wave
  • Ultra wideband differential antenna with reconfigurable trapped wave
  • Ultra wideband differential antenna with reconfigurable trapped wave

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1: An ultra-wideband differential antenna with a notch center operating frequency of 5.5 GHz.

[0024] refer to figure 1 , figure 2 with image 3 , the notched reconfigurable UWB differential antenna in this example includes a microstrip feeder 1, a microstrip dielectric substrate 2, a metal ground plate 3, a radiation element 4, two microstrip short-circuit stubs 5, and a slot line Structure 6, one director 7 and two reflectors 8.

[0025] The microstrip feeder 1 is a U-shaped differential input port. The U-shaped differential input port is composed of two 50-ohm microstrip vertical lines connected to a microstrip horizontal line. The two 50-ohm microstrip vertical lines are used for The differential signal is transmitted, and a microstrip horizontal line in the middle is used as the bottom edge of the U shape, which is used to feed the slot line structure 6 at the bottom, so as to realize the transmission of the differential mode signal and the suppress...

Embodiment 2

[0032] Embodiment 2: An ultra-wideband differential antenna with a notch center operating frequency of 6.2 GHz.

[0033] The structure of this example is the same as that of Example 1, including a microstrip feeder 1, a microstrip dielectric substrate 2, a metal ground plate 3, a radiation unit 4, two microstrip short-circuit stubs 5, and a slot line structure 6 , a director 7 and two reflectors 8, the difference lies in that the structural parameters change. in:

[0034] The length L of the uniform impedance resonator s Taking the center frequency of the notch in this example as a quarter wavelength of 6.2GHz, it is approximately 8.04mm, so the control voltage at both ends of the varactor diode is 10V.

[0035] The length L of the microstrip horizontal line of the U-shaped differential input port f1 14.6mm, line width W f1 1.9mm;

[0036] The length L of two 50-ohm microstrip vertical lines of the U-shaped differential input port f2 15.8mm, line width W f2 1.8mm;

[0...

Embodiment 3

[0044] Embodiment 3: An ultra-wideband differential antenna with a notch center operating frequency of 6.6 GHz.

[0045] The structure of this example is the same as that of Example 1, including a microstrip feeder 1, a microstrip dielectric substrate 2, a metal ground plate 3, a radiation unit 4, two microstrip short-circuit stubs 5, and a slot line structure 6 , a director 7 and two reflectors 8, the difference lies in that the structural parameters change. in:

[0046] The length L of the uniform impedance resonator s Taking the center frequency of the notch wave in this example as a quarter wavelength of 6.6GHz, it is approximately 7.6mm, so the control voltage at both ends of the varactor diode is 30V.

[0047] The length L of the microstrip horizontal line of the U-shaped differential input port f1 14.0mm, line width W f1 2.1mm;

[0048] The length L of two parallel 50 ohm microstrip vertical lines of the U-shaped differential input port f2 16mm, line width W f2 1...

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Abstract

The invention discloses an ultra wideband differential antenna with reconfigurable trapped wave, and a technical problem that the trapped wave of an existing ultra wideband differential antenna can not be reconstructed and the volume is large is mainly solved. The ultra wideband differential antenna comprises a micro strip feeder (1), a micro strip dielectric substrate (2), a metal grounding plate (3) and a radiation unit (4). Two sides of the micro strip feeder are provided with micro strip short circuit stubs (5), the center of the metal grounding plate (3) is provided with a slot line structure (6), two sides are provided with reflectors (7), and a guide device is arranged in front of the radiation unit. Each of the micro strip short circuit stubs (5) comprises a uniform impedance resonator and a variode, the adjustment of a trapped wave center frequency is realized through adjusting the control voltage of the variode, the distance between each uniform impedance resonator and the micro strip feeder is changed synchronously, and the independent adjustment of a trapped wave bandwidth is realized. The ultra wideband differential antenna has the advantages of a reconfigurable trapped wave center frequency and a small volume and can be used for mobile communication.

Description

technical field [0001] The invention belongs to the technical field of antennas, in particular to an ultra-wideband differential antenna, which can be used for mobile communication. Background technique [0002] In recent years, with the rapid development of mobile communication technology, a communication system often needs to work in multiple communication modes. If one antenna is used for each mode, the communication system will be bulky and costly. However, the UWB antenna can simultaneously cover Multiple communication modes with small footprint and low cost have been extensively studied. On the other hand, because the differential system has a better suppression effect on noise, it can improve the sensitivity of the system and meet the high-quality communication requirements of modern communication systems. In traditional systems, the general RF front-end devices are in the differential form, and the antenna is in the single-ended form. They are connected through balu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/36H01Q1/38H01Q1/50H01Q13/10H01Q23/00H01Q1/48
CPCH01Q1/36H01Q1/38H01Q1/48H01Q1/50H01Q13/106H01Q23/00
Inventor 王馨怡邹欣彤魏峰
Owner XIDIAN UNIV
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