Unlock instant, AI-driven research and patent intelligence for your innovation.

A Frequency Reconfigurable Filter Antenna with Endfire Characteristics

A technology for reconstructing filtering and antennas, applied in the field of communication, can solve the problems of large volume, concentration, and large influence of antennas, and achieve the effects of simple radio frequency control system, expanded application scope, and high anti-interference performance.

Active Publication Date: 2017-04-19
XIDIAN UNIV
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are three shortcomings in this antenna structure. First, the use of a mechanical rotation structure will increase the size of the antenna and increase the load requirements of the system.
Second, the antenna structure makes it difficult to integrate the antenna with the system
Third, the antenna structure adopts three sets of L-shaped feeding probe configurations at the feeding point, which makes the antenna processing difficult and the system error is large
However, there are two deficiencies in this antenna structure. First, the electronic switch is simply loaded on the antenna radiation unit, which will lead to poor on-off ratio of the antenna.
Second, the antenna structure makes the antenna bulky, which is not conducive to system integration
[0005] To sum up, currently reconfigurable antennas are facing three problems. 1. Adjustable frequencies are mainly concentrated in low-frequency bands such as WLAN, and there are few satellite antennas suitable for high-frequency X, Ku-band and even Ka-band
2. The choice of switches, the use of PIN tubes are more mature, but the design of the DC bias line has a greater impact on the antenna when the PIN tube is loaded on the antenna. MEMS switches are easy to use, but the development of MEMS switch preparation methods is not mature enough. At the same time The cost is high, and there are problems in engineering use
3. Under the condition of low profile, it cannot meet the requirements of antenna end-to-radiation
4. The on-off ratio of the antenna in different working frequency bands is not high

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A Frequency Reconfigurable Filter Antenna with Endfire Characteristics
  • A Frequency Reconfigurable Filter Antenna with Endfire Characteristics
  • A Frequency Reconfigurable Filter Antenna with Endfire Characteristics

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0033] Example 2: Combining figure 1 The structural diagram in the present invention further describes Embodiment 2, and the composition and structure of the antenna of Embodiment 2 in the present invention are the same as figure 1 same. The side length a1 of the triangle of the radiating patch of the third radiating unit is 1mm, the side length a2 of the inverted trapezoid of the radiating patch of the second radiating unit is 1mm, and the length a3 of the inverted trapezoidal side of the radiating patch of the first radiating unit is 1mm. In this example, the inductance value connected to the DC bias line on the dielectric substrate is 0.1μH, the dielectric constant of the dielectric substrate is 10, and the rest of the structure is the same as figure 1 Like a frequency reconfigurable filter antenna with end-fire characteristics, the relationship between each structure is also the same as figure 1 One of the frequency reconfigurable filter antennas with end-fire characteri...

Embodiment 3

[0034] Example 3: Binding figure 1 In the structure diagram, the embodiment 3 is further described, and the composition of the antenna of the embodiment 3 in the present invention is the same as figure 1 same. The side length a1 of the triangle of the radiation patch of the third radiation unit is 3mm, the side length a2 of the inverted trapezoid of the radiation patch of the second radiation unit is 3mm, and the length a3 of the inverted trapezoid of the radiation patch of the first radiation unit is 3mm. In this example, the inductance value connected to the DC bias line on the dielectric substrate is 0.1μH, the dielectric constant of the dielectric substrate is 10, and the rest of the structure is the same as figure 1 Like a frequency reconfigurable filter antenna with end-fire characteristics, the relationship between each structure is also the same as figure 1 One of the frequency reconfigurable filter antennas with end-fire characteristics.

Embodiment 4

[0035] Example 4: image 3 It is a structural diagram of Embodiment 4 of the present invention, and Embodiment 4 includes a radiation structure, a feeding structure, a filtering structure, a radio frequency control system, a reflection structure and its dielectric substrate 18 . The third radiating unit located on the upper and lower surfaces of the dielectric substrate 18 is respectively connected to the microstrip feeding structure with a two-wire feeding microstrip structure, the filtering structure is located on the side of the feeding structure, and the radio frequency control system is located on the side of the radiating structure and the filtering structure , the reflection structure located on the lower surface of the dielectric substrate 18 is located behind the radiation structure. The radiating structure adopts the first radiating unit 29 printed on the outside of the second radiating unit 28, the second radiating unit 28 printed on the outside of the third radiati...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a frequency reconfigurable filtering antenna with end-on-fire characteristics. The frequency reconfigurable filtering antenna comprises a radiation structure, a feed structure, a filtering structure, a radio frequency control system and a reflection structure. A conformal dipole composed of three radiation units is adopted as the radiation structure. A double-wire feed micro-strip structure and a micro-strip feed structure are adopted as the feed structure. The filtering structure is composed of three filtering units transversely arrayed on the side surface of the micro-strip feed structure in sequence. The radio frequency control system comprises a radio frequency component PIN tube, an inductor and a direct-current biased wire. A metal floor in the micro-strip feed structure is adopted as the reflection structure. The frequency reconfigurable filtering antenna solves the problems of adjustment difficulty of the antenna at the high frequency, instability of the directional diagram, high profile and low break-make ratio, can have the characteristics of the frequency reconfigurable filtering antenna with the end-on-fire characteristics at the X, Ku and Ka wavebands, and can be applied to wireless communication and satellite communication.

Description

technical field [0001] The invention belongs to the field of communication technology, and further relates to a frequency reconfigurable filter antenna with end-fire characteristics in the field of electromagnetic field and microwave technology. The invention can work adjustable in three frequency bands of X, Ku and Ka, has an end-to-radiation pattern, and is suitable for a modern frequency reconfigurable filter antenna with adjustable broadband frequency, end-to-radiation, and high on-off ratio. Background technique [0002] With the development of wireless communication, the importance of antennas to the entire communication equipment is more significant, and antennas with characteristics such as low profile, high gain and sufficient bandwidth will also be the trend and requirement for the development of communication systems. At the same time, with the increase of communication system functions, the number of antennas carried on each carrier is increasing, and the weight ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H01Q1/38H01Q1/48H01Q1/50
Inventor 李龙王鑫史琰翟会清梁昌洪周志鹏高铁孙磊张强刘明罡王立超唐守柱
Owner XIDIAN UNIV