Microwave antenna for receiving broadband signals

By designing a microwave antenna that includes a tight coupling unit, a resistive absorbing structure and a broadband impedance matching Barron, the shortcomings of existing broadband antennas in taking into account both broadband and efficient performance are solved, and efficient reception of broadband microwave signals is achieved and Improvement of signal transmission efficiency.

CN119419489APending Publication Date: 2025-02-11SHANGHAI INST OF SPACE POWER SOURCES
View PDF 0 Cites 0 Cited by

Patent Information

Application Number
CN202411400183.6
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-10-09
Publication Date
2025-02-11

AI Technical Summary

Technical Problem

Existing broadband antennas are difficult to take into account both broadband and efficient performance, and usually can only achieve large frequency bandwidth, and there are short-circuit effects and signal attenuation problems.

Method used

A microwave antenna including a tight coupling unit, a resistive absorbing structure and a wideband impedance matching barron were designed. The tight coupling unit is used to receive broadband microwave signals, the resistive absorbing structure eliminates the short circuit effect, and the broadband impedance matches the Barron adjusts the antenna impedance to achieve 50Ω matching.

Benefits of technology

It realizes efficient reception of wide-band microwave signals, reduces standing wave ratio, eliminates short-circuit effect, improves signal transmission efficiency, and reduces signal attenuation and reflection.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN119419489A_ABST
    Figure CN119419489A_ABST
Patent Text Reader

Abstract

The invention relates to a microwave antenna for receiving broadband signals. The microwave antenna comprises a tight coupling antenna unit, a resistive wave-absorbing surface and an impedance matching layer. The antenna is characterized in that the tight coupling antenna unit, the resistive wave-absorbing surface and the impedance matching layer are attached to the substrate. The continuous current sheet has an infinite impedance broadband in a free space, so that the tight coupling antenna unit can receive broadband microwave signals. However, only the tightly coupled antenna units can cause the short-circuit effect of the circuit, so that the resistive wave-absorbing surface is used for reducing the standing-wave ratio of the antenna array and eliminating the short-circuit effect. The impedance matching layer can enable the impedance of the PCB to be 50 ohms, and signals can be transmitted in the circuit at the maximum power under the impedance of 50 ohms, so that signal attenuation and reflection are reduced. According to the microwave antenna for receiving the broadband signal, the broadband microwave signal can be effectively received by the antenna, and the microwave antenna has the advantages of being compact in structure, high in efficiency, low in cost and the like.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] The present invention relates to the technical field of microwave energy transmission, and in particular to a microwave antenna for receiving broadband signals. Background Art

[0002] Microwave antenna is a device used to transmit and receive radio electromagnetic waves. It is an indispensable part of wireless communication and wireless energy transmission systems. Microwave antenna can transmit electromagnetic waves to free space and receive electromagnetic waves from free space. However, existing broadband antennas are difficult to achieve both broadband and high efficiency performance, and most of them can only achieve high frequency ratio bandwidth. Summary of the invention

[0003] The object of the present invention is to provide a microwave antenna for receiving broadband signals, comprising a tightly coupled unit (1), a resistive absorbing structure (2) and a broadband impedance matching balun (3); wherein

[0004] The tight coupling unit is attached to the substrate and is used to receive broadband microwave signals;

[0005] The resistive wave absorbing structure is attached below the tight coupling unit to eliminate the short-circuit effect;

[0006] The broadband impedance matching balun is attached below the tight coupling unit and is used to adjust the antenna impedance.

[0007] Preferably, the microwave antenna should absorb a frequency of 1-40 GHz.

[0008] Preferably, the power of the microwave antenna should be above 1620 mW.

[0009] Preferably, the power density of the microwave antenna should be 1.8 W / cm 2 above.

[0010] Preferably, the microwave antenna should have an efficiency of more than 95%.

[0011] A microwave antenna for receiving broadband signals of the present invention can effectively realize the antenna's reception of broadband microwave signals and has the characteristics of compact structure, high efficiency, low cost, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the front view of the microwave antenna.

[0013] Figure 2 Schematic diagram of the back side of a microwave antenna. DETAILED DESCRIPTION

[0014] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0015] The tightly coupled unit, resistive absorbing structure and impedance matching layer are attached to the substrate. Since the continuous current sheet has an infinite impedance bandwidth in free space, the tightly coupled unit can receive broadband microwave signals. The resistive absorbing structure reduces the standing wave ratio of the antenna array and eliminates the short-circuit effect. The impedance matching layer makes the antenna impedance 50Ω. Under the impedance of 50Ω, the signal can be transmitted in the circuit with maximum power, thereby reducing signal attenuation and reflection;

[0016] The tight coupling unit is attached to the substrate and is used to receive broadband microwave signals;

[0017] The resistive absorbing surface is attached below the tight coupling unit to eliminate the short-circuit effect;

[0018] The broadband impedance matching balun is attached above the tight coupling unit and is used to adjust the antenna impedance;

[0019] The wide multi-band antenna design should absorb frequencies between 1 and 40 GHz, have a power of more than 1620 mW, and a rate density of 1.8 W / cm 2 Above, the efficiency should be above 95%.

[0020] The present invention is further described in conjunction with the accompanying drawings.

[0021] The concept of continuous current sheet As an ideal model of ideal dipoles arranged in a plane, a continuous current sheet has infinite impedance bandwidth in free space, and its impedance is a pure real number.

[0022] Perform preliminary antenna design based on theory, such as Figure 1 As shown, the tightly coupled antenna unit is attached to the substrate. However, the antenna array is short-circuited when f = c0 / 2h, which is generally called a short-circuit effect, showing a large standing wave ratio. At this time, the antenna output power is low.

[0023] To solve this problem, adding a resistive absorbing surface to the substrate can effectively eliminate the short-circuit effect, such as Figure 1 As shown, the standing wave ratio is reduced, and the impedance matching layer can adjust the PCB impedance to 50Ω. Under 50Ω impedance, the signal can be transmitted in the circuit with maximum power, thereby reducing signal attenuation and reflection.

[0024] The full antenna array of the present invention can strengthen and improve the directivity of the radiation field, so that the signal is enhanced in a specific direction. Compared with a single antenna, the full antenna array has a higher gain.

[0025] Although the content of the present invention has been described in detail through the above preferred embodiments, it should be appreciated that the above description should not be considered as a limitation of the present invention. After reading the above content, it will be apparent to those skilled in the art that various modifications and substitutions of the present invention will occur. Therefore, the protection scope of the present invention should be limited by the appended claims.

Claims

1. A microwave antenna for receiving broadband signals, characterized in that: It comprises a tightly coupled unit (1), a resistive wave absorbing structure (2) and a broadband impedance matching balun (3); wherein The tight coupling unit is attached to the substrate and is used to receive broadband microwave signals; The resistive wave absorbing structure is attached below the tight coupling unit to eliminate the short-circuit effect; The broadband impedance matching balun is attached below the tight coupling unit and is used to adjust the antenna impedance.

2. A microwave antenna for receiving broadband signals according to claim 1, characterized in that: The microwave antenna should absorb frequencies between 1 and 40 GHz.

3. A microwave antenna for receiving broadband signals according to claim 1, characterized in that: The power of the microwave antenna should be above 1620mW.

4. The microwave antenna for receiving broadband signals according to claim 1, characterized in that: The power density of the microwave antenna should be 1.8W / cm 2 above.

5. The microwave antenna for receiving broadband signals according to claim 1, characterized in that: The microwave antenna should have an efficiency of more than 95%.