A gradient voltage-excited miniature extremely wideband directional antenna

Abstract

The present invention discloses a gradient voltage-excited miniature ultra-wideband directional antenna comprising eight arrays and a logarithmic periodic silicon-based support structure. The arrays are directly bonded to the logarithmic periodic silicon-based support structure, forming periodically arranged array pairs. Each array is directly fed by a voltage source, and each array pair generates strong resonance, enhancing the frequency of the corresponding array and increasing the antenna gain. Eight arrays are bonded above the logarithmic periodic silicon-based support structure, with the eight arrays spaced evenly and distributed in a logarithmic pattern. Eight arrays are bonded below the logarithmic periodic silicon-based support structure, with the eight arrays spaced evenly and distributed in a logarithmic pattern, and the eight arrays are aligned above and below. The present invention utilizes gradient voltage excitation, breaking through the inherent relationship between antenna wavelength and antenna size. This achieves miniaturization while providing extremely wideband coverage from very low frequencies to millimeter waves and enhancing antenna gain.

Description

Technical Field

[0001] The present invention relates to the field of very low frequency to microwave propagation, and in particular to a gradient voltage-excited miniature extremely wideband directional antenna. Background Art

[0002] Equipment used for Earth observation or airborne and satellite-borne ground communications often requires antennas with directional radiation characteristics and an extremely wide frequency band to monitor existing radio equipment on the ground. Therefore, the design of extremely wideband antennas has become a research hotspot and an important direction. With the advancement of wireless technology, many devices are moving towards miniaturization and microscopy. However, traditional antenna designs are often proportional to the antenna's operating wavelength, resulting in large antenna sizes at low frequencies, which cannot meet the current miniaturization and microscopy requirements.

[0003] With the development of wireless communications, the frequency bands used not only cover low frequencies but also extend to microwaves, with microwaves becoming a key application area. Very low frequencies (VLF) are crucial for ground-based or land-based equipment. Therefore, a single device must cover VLF to microwave frequencies. Miniaturization of the device requires small antennas, and too many antennas cannot be installed on the same device. Consequently, traditional antenna design methods struggle to achieve extremely wideband coverage and miniaturize antennas, hindering the integration of antennas and devices.

[0004] Traditional antennas are difficult to adjust in gain, and since most antenna structures are fixed, the resonant frequency and operating bandwidth are difficult to change, making them unsuitable for different scenarios and communication devices. To reduce the number of antennas in a device and improve its electromagnetic compatibility, miniaturized ultra-wideband antennas are being developed. Therefore, it is necessary to develop a miniature ultra-wideband antenna with controllable bandwidth and gain. This would overcome the constraints of the relationship between antenna wavelength and antenna size, enable the design of ultra-wideband antennas, and further enhance the coverage and signal transmission quality of communication systems. Summary of the Invention

[0005] In order to address the limitations of traditional antennas in size, frequency coverage and gain, the present invention provides an ultra-wideband antenna with gradient voltage excitation. By adopting an innovative design of gradient voltage excitation and logarithmic periodic arrangement, it breaks through the inherent relationship between antenna wavelength and antenna size, achieves miniaturization, and provides ultra-wideband coverage from very low frequency to millimeter wave, enhances the gain of the antenna, and enables the antenna to meet the needs of ultra-wideband sensing applications while maintaining miniaturization, with higher flexibility and adaptability.

[0006] To achieve the above-mentioned object, the present invention provides a gradient voltage-excited miniature extremely wideband directional antenna, comprising eight arrays and a logarithmic periodic silicon-based support structure;

[0007] The arrays are directly bonded onto the logarithmic periodic silicon-based support structure to form periodically arranged array pairs; each array is directly fed by a voltage source, and each array pair generates strong resonance to enhance the frequency of the corresponding array, thereby improving the gain of the antenna;

[0008] Eight arrays are bonded to the logarithmic periodic silicon-based support structure, and the eight arrays are evenly spaced and logarithmically distributed.

[0009] Eight arrays are bonded underneath the logarithmic periodic silicon-based support structure. The eight arrays are distributed at equal intervals and in a logarithmic distribution characteristic, and the upper and lower eight arrays are aligned.

[0010] Preferably, the eight arrays are composed of eight pairs of piezoelectric material films, sixteen pairs of silver film electrodes and eight pairs of giant magnetostrictive alloy materials, and each array is composed of a pair of silver film electrodes, a piezoelectric material film and a giant magnetostrictive alloy film; wherein, two piezoelectric material films and two giant magnetostrictive alloy films constitute a pair of piezoelectric material films and a pair of giant magnetostrictive alloy films respectively.

[0011] Preferably, the piezoelectric material film generates a resonant frequency under the excitation of the silver film electrode voltage, and drives the giant magnetostrictive alloy film to radiate electromagnetic waves;

[0012] The silver thin film electrode and the piezoelectric material film have the same length, and the giant magnetostrictive alloy film is shorter than the silver thin film electrode and the piezoelectric material film, and the length difference is 1 / 20 of the array length;

[0013] The silver thin film electrodes are excited in parallel by a voltage source.

[0014] Preferably, the silver thin film electrodes in the upper and lower arrays close to the logarithmic periodic silicon-based support structure are connected to each other and directly connected to the positive electrode of the voltage source;

[0015] The silver thin film electrodes in the upper and lower arrays that are away from the logarithmic periodic silicon-based support structure are connected to each other and directly connected to the negative electrode of the voltage source.

[0016] Preferably, voltage excitation is adopted, and the piezoelectric material film is made to work in different resonance modes by different excitation voltages, resulting in different resonance frequencies and working bandwidths of the antenna, so that the electrical dimensions of the antenna change, the gain of the antenna changes, and the bandwidth and gain of the antenna are controllable.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] This invention achieves precise control of the antenna elements by directly feeding power to each element through a voltage source, enhancing the antenna's resonance characteristics and directivity. The elements are arranged periodically in a logarithmic structure, which helps achieve the antenna's broadband characteristics. The addition of a giant magnetostrictive alloy to the elements enhances the antenna's resonance and further improves its performance. This invention employs a gradient voltage excitation method, breaking through the inherent relationship between antenna wavelength and size. While achieving miniaturization, it also provides extremely broadband coverage from very low frequencies to millimeter waves, enhancing the antenna's gain. This allows the antenna to meet the needs of extremely broadband sensing applications while maintaining its miniaturization, providing greater flexibility and adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solution of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 A top view of the antenna structure according to an embodiment of the present invention;

[0021] Figure 2 This is a front view of the antenna structure and a three-dimensional structure diagram of the array according to an embodiment of the present invention.

[0022] Explanation of the accompanying symbols: 1. array; 2. logarithmic periodic silicon-based support structure; 3. silver thin film electrode; 4. piezoelectric material film; 5. giant magnetostrictive alloy film. DETAILED DESCRIPTION

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] like Figure 1 and Figure 2As shown, this embodiment provides a gradient voltage-excited micro-extremely wideband directional antenna, comprising eight arrays 1 and a logarithmic periodic silicon-based support structure 2. The eight arrays 1 are composed of eight pairs of piezoelectric thin films 4, sixteen pairs of silver thin film electrodes 3, and eight pairs of giant magnetostrictive alloy 5 materials. Each array 1 is composed of a pair of silver thin film electrodes 3, a piezoelectric thin film 4, and a giant magnetostrictive alloy 5. Two piezoelectric thin films 4 and two giant magnetostrictive alloy thin films 5 constitute a pair of piezoelectric thin films 4 and a pair of giant magnetostrictive alloy thin films 5, respectively.

[0026] like Figure 1 As shown, the arrays 1 of this embodiment are directly bonded to a logarithmic periodic silicon-based support structure 2. Eight arrays 1 are bonded above the logarithmic periodic silicon-based support structure 2, and the eight arrays 1 are bonded below the logarithmic periodic silicon-based support structure 2, and the eight arrays 1 are bonded below the logarithmic periodic silicon-based support structure 2, and the eight arrays 1 are also bonded below the logarithmic periodic silicon-based support structure 2. The eight arrays 1 are aligned and arranged in a periodic pattern, forming eight array pairs. The synergistic effect of the array pairs achieves a directional antenna design. Each array 1 is directly fed by a voltage source, and each pair of arrays 1 produces a strong resonance that enhances the frequency of the corresponding array 1, increasing the antenna gain and achieving a high-gain antenna design. The array pairs form a logarithmic structure, and the corresponding arrays 1 above and below form an array pair, generating the same resonant frequency, which enhances gain and signal.

[0027] like Figure 2 As shown, the eight arrays 1 above the logarithmic periodic silicon-based support structure 2 have a logarithmic distribution characteristic, the lengths of the silver thin film electrodes 3 and the piezoelectric material films 4 are the same, the giant magnetostrictive alloy film 5 is shorter than the silver thin film electrodes 3 and the piezoelectric material films 4, and the length difference is 1 / 20 of the length of the array 1; the eight arrays 1 below the logarithmic periodic silicon-based support structure 2 have a logarithmic distribution characteristic, the lengths of the silver thin film electrodes 3 and the piezoelectric material films 4 are the same, the giant magnetostrictive alloy film 5 is shorter than the silver thin film electrodes 3 and the piezoelectric material films 4, and the length difference is 1 / 20 of the length of the array 1.

[0028] In this embodiment, the silver thin film electrodes 3 in the upper and lower arrays 1 close to the logarithmic periodic silicon-based support structure 2 are connected to each other and directly connected to the positive electrode of the voltage source; the silver thin film electrodes 3 in the upper and lower arrays 1 away from the logarithmic periodic silicon-based support structure 2 are connected to each other and directly connected to the negative electrode of the voltage source.

[0029] In this embodiment, the piezoelectric material film 4 generates a resonant frequency under the excitation of the voltage of the silver film electrode 3, and drives the giant magnetostrictive alloy film 5 to radiate electromagnetic waves. The resonant frequency of the antenna can be controlled by adjusting the voltage to achieve controllable operating frequency and bandwidth. The silver electrode pair is excited in parallel by a voltage source.

[0030] The piezoelectric material film 4 resonates under the excitation of the voltage of the silver film electrode 3, and transmits the resonant frequency to the giant magnetostrictive alloy 5 to generate electromagnetic wave radiation. Since all the arrays 1 are logarithmically distributed, the short arrays 1 in the entire antenna have a guiding effect, and the long arrays 1 have a reflecting effect, making the antenna exhibit directional radiation.

[0031] The antenna of this embodiment adopts the form of voltage excitation. By changing the excitation voltage, the piezoelectric material film 4 can operate in different resonance modes, resulting in different resonance frequencies and working bandwidths of the antenna. As a result, the electrical dimensions of the antenna will also change, and the gain of the antenna will also change, thereby achieving controllable bandwidth and gain of the antenna.

[0032] The antenna of this embodiment adopts voltage excitation, breaks through the restriction of the relationship between antenna wavelength and antenna size, and can cover the very low frequency to millimeter wave band.

[0033] In summary, the present embodiment provides an ultra-wideband antenna with gradient voltage excitation. By adopting an innovative design of gradient voltage excitation and logarithmic periodic arrangement, it solves the limitations of traditional antennas in size, frequency coverage, and gain, breaks through the inherent relationship between antenna wavelength and antenna size, and achieves miniaturization while providing ultra-wideband coverage from very low frequency to millimeter wave, enhancing the gain of the antenna, so that the antenna can meet the needs of ultra-wideband sensing applications while maintaining miniaturization, and has higher flexibility and adaptability.

[0034] The embodiments described above are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by persons skilled in the art should fall within the scope of protection defined by the claims of the present invention.

Claims

1. A gradient voltage-excited miniature ultra-wideband directional antenna, characterized in that: It includes an eight-way grid and a logarithmic periodic silicon-based support structure; The arrays are directly bonded onto the logarithmic periodic silicon-based support structure to form periodically arranged array pairs; each array is directly fed by a voltage source, and each array pair generates strong resonance to enhance the frequency of the corresponding array, thereby improving the gain of the antenna; Eight arrays are bonded to the logarithmic periodic silicon-based support structure, and the eight arrays are evenly spaced and logarithmically distributed. Eight arrays are bonded to the bottom of the logarithmic periodic silicon-based support structure. The eight arrays are evenly spaced and logarithmically distributed, and the upper and lower eight arrays are aligned. The eight arrays are composed of eight pairs of piezoelectric material films, sixteen pairs of silver film electrodes and eight pairs of giant magnetostrictive alloy materials, and each array is composed of a pair of silver film electrodes, a piece of piezoelectric material film and a piece of giant magnetostrictive alloy; among them, two pieces of piezoelectric material films and two pieces of giant magnetostrictive alloy films constitute a pair of piezoelectric material films and a pair of giant magnetostrictive alloy films respectively.

2. The gradient voltage-excited micro-ultra-wideband directional antenna according to claim 1, characterized in that: The piezoelectric material film generates a resonant frequency under the excitation of the silver film electrode voltage, and drives the giant magnetostrictive alloy film to radiate electromagnetic waves; The silver thin film electrode and the piezoelectric material film have the same length, and the giant magnetostrictive alloy film is shorter than the silver thin film electrode and the piezoelectric material film, and the length difference is 1 / 20 of the array length; The silver thin film electrodes are excited in parallel by a voltage source.

3. The gradient voltage-excited micro-ultra-wideband directional antenna according to claim 1, characterized in that: The silver thin film electrodes in the upper and lower arrays close to the logarithmic periodic silicon-based support structure are connected to each other and directly connected to the positive electrode of the voltage source; The silver thin film electrodes in the upper and lower arrays that are away from the logarithmic periodic silicon-based support structure are connected to each other and directly connected to the negative electrode of the voltage source.

4. The gradient voltage-excited micro-ultra-wideband directional antenna according to claim 1, characterized in that: By adopting the form of voltage excitation, the piezoelectric material film works in different resonance modes through different excitation voltages, resulting in different resonance frequencies and working bandwidths of the antenna, causing the electrical dimensions of the antenna to change, and the gain of the antenna to change, thereby achieving controllable bandwidth and gain of the antenna.

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