Method for realizing switching of low-profile dipole antenna through photoresistor

Abstract

The method comprises the following steps: selecting the photoresistor and an adjustable light source corresponding to the photoresistor, installing the adjustable light source in an antenna housing, welding the photoresistor at a feeding point position of the low-profile dipole antenna, enabling the light-receiving surface of the photoresistor to face the adjustable light source, and enabling the light-receiving surface of the photoresistor to face the adjustable light source. The connecting line of the photoresistor and the adjustable light source is not shielded, and the microwave energy conversion efficiency of the low-profile dipole antenna is adjusted by adjusting the intensity of the adjustable light source in the antenna housing. The microwave energy conversion efficiency of the low-profile dipole antenna can be adjusted only by using the photoresistor and the adjustable light source, and the cost is extremely low.

Description

Technical Field

[0001] This invention belongs to the field of antenna switches, and specifically relates to a method for realizing a low-profile dipole antenna switch using a photoresistor. Background Technology

[0002] On the one hand, high-power microwave weapons can emit microwave pulses with peak power reaching the gigawatt level, capable of destroying or paralyzing critical electronic systems such as radar, communication, and navigation systems at long distances. On the other hand, as electronic devices develop towards miniaturization and high-density integration, sensitive components such as internal chips are easily affected by complex electromagnetic environments. High-power devices at close range can interfere with or even damage low-power devices such as communication and navigation systems. High-power microwave protection technology is an "electronic shield" that defends against high-power microwave weapons and ensures the survivability of battlefield electronic systems. It is also a core support for maintaining the stable operation of electronic equipment in civilian fields such as communication base stations and aerospace.

[0003] Microwave high-power protection technologies are mainly divided into two categories: active protection and passive protection. The core principle is to achieve protection by blocking, absorbing, or transferring microwave energy. Active protection technology actively intervenes in the microwave propagation path or source, fundamentally reducing energy threats. Active adjustable electromagnetic shielding technology involves setting up a dynamically adjustable electromagnetic barrier around the protected area, switching the shielding state in real time according to microwave characteristics, and flexibly reflecting or scattering incoming energy.

[0004] Research on active adjustable electromagnetic shielding technology includes electromagnetic shielding materials based on materials such as carbon nanotubes, and shielding composite materials based on polyurethane nonwoven fabrics. Although active adjustable electromagnetic shielding technology has been achieved, it is technically challenging, costly, and not conducive to equipment upgrades and modifications. Summary of the Invention

[0005] The purpose of this invention is to propose a method for switching a low-profile dipole antenna using a photoresistor. This method can adjust the microwave energy conversion efficiency of a low-profile dipole antenna using only a photoresistor and an adjustable light source, at extremely low cost.

[0006] The technical solution to achieve the purpose of this invention is as follows:

[0007] A method for switching a low-profile dipole antenna using a photoresistor includes: selecting a photoresistor and a corresponding adjustable light source; installing the adjustable light source inside the radome; welding the photoresistor to the feed point of the low-profile dipole antenna; ensuring the light-facing side of the photoresistor faces the adjustable light source; ensuring there are no obstructions on the connection between the photoresistor and the adjustable light source; and adjusting the microwave energy conversion efficiency of the low-profile dipole antenna by adjusting the intensity of the adjustable light source inside the radome.

[0008] Preferably, the photoresistor and the corresponding adjustable light source are selected as follows: visible light photoresistor is used with visible light adjustable light source, infrared light photoresistor is used with infrared light adjustable light source, and ultraviolet light photoresistor is used with ultraviolet light adjustable light source.

[0009] Preferably, the size of the photoresistor that matches the antenna feed point spacing is determined based on the antenna feed point spacing.

[0010] Preferably, multiple photoresistors are connected in parallel to increase the adjustment range of the microwave energy conversion efficiency of the low-profile dipole antenna.

[0011] Preferably, the adjustable light source is an adjustable laser light source, and the laser beam is aimed at the photosensitive area of ​​the photoresistor.

[0012] Preferably, the adjustable light source is located in the non-main lobe direction of the dipole antenna, at the edge of the radome.

[0013] Preferably, the power supply line of the adjustable light source is parallel to the polarization direction of the dipole antenna.

[0014] Preferably, there are multiple adjustable light sources.

[0015] Preferably, there are an even number of adjustable light sources 2, and the adjustable light sources 2 and their power supply lines are symmetrically placed on both sides of the antenna axis.

[0016] Compared with the prior art, the significant advantages of the present invention are:

[0017] 1. The efficiency of low-profile dipole antennas in converting microwave energy can be adjusted using only photoresistors and tunable light sources, resulting in extremely low cost and making them particularly suitable for civilian products.

[0018] 2. A photoresistor is welded to the feed point of the low-profile dipole antenna, and an adjustable light source is installed inside the radome. The microwave energy conversion efficiency of the low-profile dipole antenna can be adjusted by adjusting the intensity of the light source inside the radome. The operation is simple and easy to upgrade and modify the equipment.

[0019] 3. There are many types of photoresistors to choose from, and semiconductor materials such as metal sulfides, selenides or tellurides can be used, making them suitable for a wide range of scenarios.

[0020] 4. Laser light sources and semiconductor materials are updated rapidly, and there is room for further improvement in the performance of this invention. Attached Figure Description

[0021] Figure 1 This is a schematic diagram showing the installation of the photoresistor and adjustable light source inside the radome.

[0022] Among them, 1-photoresistor, 2-tunable light source, 3-radome, 4-low profile dipole antenna. Detailed Implementation

[0023] Generally, phased array RF front-end components are interconnected with the antenna and surrounded by an antenna radome. For low-profile dipole antennas, to achieve low-cost, actively adjustable electromagnetic shielding technology, this invention proposes a method for switching low-profile dipole antennas using a photoresistor, combined with... Figure 1 The specific implementation steps of this method are as follows:

[0024] 1. Select the matching photoresistor 1 and adjustable light source 2. The visible light photoresistor is used with the visible light adjustable light source, the infrared light photoresistor is used with the infrared light adjustable light source, and the ultraviolet light photoresistor is used with the ultraviolet light adjustable light source.

[0025] 2. Install an adjustable light source 2 inside the radome 3.

[0026] 3. Select a photoresistor 1 of appropriate size according to the spacing of the antenna feed points. The size of photoresistor 1 should be such that it is easy to solder.

[0027] 4. Weld the photoresistor 1 to the feed point of the low-profile dipole antenna 4, with the light-facing side of the photoresistor 1 facing the adjustable light source 2, and there is no obstruction on the connection line between the photoresistor 1 and the adjustable light source 2.

[0028] The efficiency of the low-profile dipole antenna 4 in converting microwave energy is adjusted by regulating the intensity of the adjustable light source 2 inside the radome 3.

[0029] The adjustable light source 2 inside the radome 3 is located in the non-main lobe direction of the dipole antenna, preferably close to the edge of the radome, to avoid pattern distortion.

[0030] The power supply line of the adjustable light source 2 inside the radome 3 is parallel to the polarization direction of the dipole antenna.

[0031] To reduce the influence of the adjustable light source 2 and its power supply line on the radiation pattern of the dipole antenna, an even number of adjustable light sources 2 can be used. The adjustable light sources 2 and their power supply lines are symmetrically placed on both sides of the antenna axis to cancel asymmetric scattering and avoid radiation pattern distortion.

[0032] To increase the adjustment range of the microwave energy conversion efficiency of the low-profile dipole antenna 4, multiple photoresistors 1 can be connected in parallel.

[0033] To increase the adjustment range of the microwave energy conversion efficiency of the low-profile dipole antenna 4, multiple adjustable light sources 2 can be installed inside the radome 3.

[0034] To improve the directionality of the tunable light source 2, an tunable laser light source can be used, with the laser beam aligned with the photosensitive area of ​​the photoresistor 1.

[0035] This invention uses only a photoresistor and an adjustable light source to adjust the microwave energy conversion efficiency of a low-profile dipole antenna, resulting in extremely low cost and making it particularly suitable for civilian applications.

[0036] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A method for switching a low-profile dipole antenna using a photoresistor, characterized in that: include: Select a photoresistor and its corresponding adjustable light source, install the adjustable light source inside the radome, and weld the photoresistor to the feed point of the low-profile dipole antenna. The light-facing side of the photoresistor faces the adjustable light source, and there are no obstructions on the connection line between the photoresistor and the adjustable light source. The microwave energy conversion efficiency of the low-profile dipole antenna can be adjusted by adjusting the intensity of the adjustable light source inside the radome.

2. The method for switching a low-profile dipole antenna using a photoresistor according to claim 1, characterized in that: The photoresistors and their corresponding adjustable light sources are selected as follows: visible light photoresistors are used with visible light adjustable light sources, infrared light photoresistors are used with infrared light adjustable light sources, and ultraviolet light photoresistors are used with ultraviolet light adjustable light sources.

3. The method for switching a low-profile dipole antenna using a photoresistor according to claim 1, characterized in that: The size of the photoresistor that matches the antenna feed point spacing is determined based on the spacing.

4. The method for switching a low-profile dipole antenna using a photoresistor according to claim 1, characterized in that: By using multiple photoresistors in parallel, the adjustment range of the microwave energy conversion efficiency of the low-profile dipole antenna is increased.

5. The method for switching a low-profile dipole antenna using a photoresistor according to claim 1, characterized in that: The adjustable light source is an adjustable laser light source, and the laser beam is aimed at the photosensitive area of ​​the photoresistor.

6. The method for switching a low-profile dipole antenna using a photoresistor according to claim 5, characterized in that: The adjustable light source is located in the non-main lobe direction of the dipole antenna, at the edge of the radome.

7. The method for switching a low-profile dipole antenna using a photoresistor according to claim 1, characterized in that: The power supply line of the adjustable light source is parallel to the polarization direction of the dipole antenna.

8. A method for switching a low-profile dipole antenna using a photoresistor according to claim 4, characterized in that: There are multiple adjustable light sources.

9. A method for switching a low-profile dipole antenna using a photoresistor according to claim 8, characterized in that: There are an even number of adjustable light sources, and the adjustable light sources and their power supply lines are symmetrically placed on both sides of the antenna axis.

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