CN103457017A - Three-frequency dual polarization cone conformal micro-strip antenna array - Google Patents

Abstract

The invention discloses a triple-frequency dual-polarization conical conformal omnidirectional microstrip antenna array. The triple-frequency operation is realized by placing the single-frequency and dual-frequency microstrip antenna arrays up and down on the surface of the cone, and the antenna array is uniform. Surround the surface of the cone to achieve omnidirectional coverage of the beam. Each array consists of four microstrip antenna elements fed in parallel through microstrip lines. The single-frequency antenna unit is fed by the radiating side of the microstrip antenna, and the dual-frequency antenna unit is fed by the non-radiating side of the microstrip antenna. Slits are made on the non-radiating side of the single-frequency antenna unit to reduce the size of the patch, and the patch unit works for linear polarization; dual-frequency is achieved by slits on the radiating side of the dual-frequency antenna unit, and the low frequency is circular Polarization, high frequency is linear polarization. The microstrip medium used in antenna processing is a flexible special medium. The invention can realize the working requirement of triple frequency and dual polarization on the limited carrier surface, and can realize the omnidirectional coverage of the beam.

Description

Triple-band dual-polarized conical conformal microstrip antenna array

technical field

The invention relates to a microstrip antenna array conformal to the surface of a conical carrier, in particular to a triple-frequency dual-polarization conical conformal microstrip antenna array.

Background technique

With the continuous development of modern communications and military, the electronic components required by airborne, spaceborne and various communication and telemetry remote control systems are developing rapidly in the direction of short, small, light, thin, high reliability and high speed. In terms of performance, there is an urgent need for high-performance array antennas with good electromagnetic compatibility, less susceptible to electronic interference, small RCS (Radar Cross Section), and stealth/anti-stealth characteristics. Conformal microstrip antennas have a series of advantages such as low profile, light weight, small size, and easy to achieve conformality, so they have been paid more and more attention in recent years.

The conformal microstrip antenna on the projectile also puts forward new requirements for the design of the conformal antenna due to the particularity of its use environment. The conformal microstrip antenna on the projectile often needs to be designed on the cone surface due to aerodynamic considerations, but due to the relatively complex geometric shape of the cone surface, the design is difficult. In addition, the conformal antenna on the projectile needs to be omnidirectional to ensure that the projectile receives signals when it is in flight and rotating. The design of the omnidirectional antenna needs to carefully consider the arrangement of the antenna elements so that the omnidirectional coverage of the antenna pattern can be satisfied. With the development of communication technology, dual-frequency and multi-frequency working modes have increasingly become the mainstream of technology. The conformal antenna on the projectile also has the same requirement to ensure the sharing of sending and receiving. However, how to realize dual-frequency or multi-frequency operation on the limited size of the missile body is also a technical difficulty, and there is no related description in the prior art.

Contents of the invention

The object of the present invention is to provide a triple-frequency dual-polarized conical conformal microstrip antenna array.

The technical solution to realize the object of the present invention is: a triple-frequency dual-polarized conical conformal microstrip antenna array, including a conical carrier, a first microstrip line, a first microstrip antenna array, a second microstrip line and a second A microstrip antenna array, the first microstrip antenna array and the second microstrip antenna array are both arranged on the outer surface of the conical carrier, and uniformly surround the surface of the conical carrier, wherein the first microstrip antenna array is located on the second microstrip Above the antenna array, wherein the first microstrip antenna array includes four single-frequency microstrip antenna units, the four single-frequency microstrip antenna units are connected in parallel through the first microstrip line, and the second microstrip antenna array includes four dual-frequency A microstrip antenna unit, the four dual-band microstrip antenna units are connected in parallel through a second microstrip line. the

Compared with the prior art, the present invention has the following significant advantages: 1) Slits are made on the microstrip patch of the single-frequency antenna unit to reduce the size of the antenna to meet the requirements of the axial size of the conical carrier; 2) The dual-frequency antenna unit Slits on the microstrip patch realize dual-frequency operation; 3) The present invention uses three microstrip antenna arrays with different resonant frequencies to be placed up and down on the conical carrier to meet the three-frequency working requirements, and the multi-frequency working method can increase information Communication capacity; 4) In the dual-frequency microstrip antenna unit, circular polarization is realized through perturbation and side feed, and the circular polarization working method is used to receive GPS signals; 5) Realized on the complex geometric structure of the cone Omnidirectional antenna beam coverage is achieved, which can ensure that the carrier can still receive signals under the condition of high-speed rotation; 6) The present invention can realize the three-frequency dual-polarization working requirement on the limited carrier surface, and can realize the omnidirectional beam sexual coverage.

The present invention will be described in further detail below in conjunction with the accompanying drawings.

Description of drawings

FIG. 1 is a structure diagram of a triple-band conformal microstrip antenna on a cone of the present invention.

Fig. 2 is a top view of the dual-band microstrip antenna unit of the present invention.

Fig. 3 is a side view of the dual-band microstrip antenna unit of the present invention.

Fig. 4 is a top view of the single-frequency microstrip antenna unit of the present invention.

Fig. 5 is a side view of the single-frequency microstrip antenna unit of the present invention.

Fig. 6 is a graph showing reflection coefficient results of the dual-band microstrip antenna array of the present invention.

Fig. 7 is a result diagram of the omnidirectional axial ratio of the dual-frequency microstrip antenna array of the present invention at low frequencies.

Fig. 8 is a graph showing reflection coefficient results of the single-frequency microstrip antenna array of the present invention.

Detailed ways

A triple-frequency dual-polarized conical conformal microstrip antenna array of the present invention includes a conical carrier 1, a first microstrip line 2, a first microstrip antenna array 3, a second microstrip line 4 and a second microstrip antenna Array 5, the first microstrip antenna array 3 and the second microstrip antenna array 5 are all arranged on the outer surface of the conical carrier 1, and uniformly surround the conical carrier surface, wherein the first microstrip antenna array 3 is located on the second Above the microstrip antenna array 5, wherein the first microstrip antenna array 3 includes four single-frequency microstrip antenna units 11, the four single-frequency microstrip antenna units 11 are connected in parallel through the first microstrip line 2, and the second microstrip The antenna array 5 includes four dual-band microstrip antenna units 6 connected in parallel through the second microstrip line 4 .

The single-frequency microstrip antenna unit 11 is fed on the radiation side through the first microstrip line 2 , and the dual-frequency microstrip antenna unit 6 is fed on the non-radiation side through the second microstrip line 4 .

The dual-band microstrip antenna unit 6 includes a second floor 8, a second medium 9 and a second microstrip patch 10, the second floor 8 is located under the second medium 9, and the second microstrip patch 10 is located on the second Above the medium 9, there is a slit on the radiation side of the second microstrip patch 10, and the two slits are symmetrical about the vertical center line of the second microstrip patch 10; the single-frequency microstrip antenna unit 11 includes a first Floor 13, the first medium 14 and the first microstrip patch 15, the first floor 13 is located below the first medium 14, the first microstrip patch 15 is located above the first medium 14, the first microstrip patch There are two slits on each non-radiating side of the sheet 15, and the single-frequency microstrip antenna unit 11 is symmetrical about the vertical center line.

The length of the dual-frequency microstrip antenna unit 6 is b1, the width is a1, the length of the slot is b2, the width of the slot is a2, the distance between the left slot and the left edge of the antenna is a5, the feeder line width of the antenna unit is a3, and the The distance between the feeder and the right edge of the antenna is a4, and the specific dimensions are: a1 is 59.8mm, b1 is 62.0mm, a2 is 2.2mm, b2 is 45.7mm, a3 is 1.3mm, a4 is 8.3mm, and a5 is 2.0mm.

The width of the single-frequency microstrip antenna unit 11 is a6, the length of the upper left slit and the upper edge of the antenna unit is b3, the width of the upper left slit is b4, and the length is a7, the length of the adjacent side of the upper left slit and the lower left slit is b5, and the length of the upper left slit is b5. The width is b6, the length is a7, the length between the lower left slit and the bottom edge of the antenna unit is b7, the depth of the feeder inserted into the antenna unit is b8, the width of the slit on both sides of the feeder is a8, and the specific dimensions are: b3 is 8.5mm, b4 is 3.0mm , b5 is 6.0mm, a6 is 56.2mm, a7 is 18.7mm, a8 is 1.1mm, b6 is 3.0mm, b7 is 8.5mm, b8 is 12.0mm.

Both the thickness of the second medium 9 and the first medium 14 are 1.143 mm, the dielectric constant is 2.17, and the loss angle is 0.0009.

The present invention will be described in further detail below in conjunction with the accompanying drawings.

An L-band and S-band conical conformal omnidirectional triple-frequency microstrip array of the present invention includes two microstrip antenna arrays, the first microstrip antenna array corresponds to one operating frequency, and the second microstrip antenna array corresponds to two working frequency, and placed on the surface of the cone conformally up and down, where the first microstrip antenna array is placed on the shorter part of the cone circumference, and the corresponding second microstrip antenna array is placed on the longer cone circumference. part. Both the first microstrip antenna array and the second microstrip antenna array are composed of four microstrip antenna units fed in parallel by microstrip lines, and the four antenna units of the first microstrip antenna array and the second microstrip antenna array evenly distributed on the circumference. The antenna unit of the second microstrip antenna array is fed by the non-radiating side of the microstrip line. At the same time, the antenna unit realizes dual-frequency operation by slits on the radiation side. The antenna unit is circularly polarized at low frequencies and linearly polarized at high frequencies. ; The antenna unit of the first microstrip antenna array is fed by the radiating side of the microstrip line, and at the same time, slots are opened on the non-radiating side of the antenna unit, thereby realizing miniaturization, and the antenna unit works for linear polarization. The first microstrip antenna array corresponds to one operating frequency, and the second microstrip antenna array corresponds to two operating frequencies.

In combination with Fig. 1 , an omnidirectional conformal microstrip antenna array for L-band and S-band tri-band work according to the patent of the present invention includes a conical carrier 1, a first microstrip antenna array 3, a first microstrip line 2, a second Microstrip antenna array 5, the second microstrip line 4, the first microstrip line 2 connects four single-frequency microstrip antenna units 11 through parallel feed, and the second microstrip line 4 connects four dual-frequency microstrip antenna units 11 through parallel feed. With antenna unit 6.

Combined with Fig. 2, the top view of the dual-frequency microstrip antenna unit 6 of the patent of the present invention is characterized in that the dual-frequency operation of the antenna is realized by opening a slot on each radiation side, and the input port 7 is the feed port of the antenna unit. The length of the dual-frequency microstrip antenna unit 6 is b1, the width is a1, the length of the slot is b2, the width of the slot is a2, the distance between the left slot and the left edge of the antenna is a5, the feeder width of the antenna unit is a3, and the The distance between the feeder and the right edge of the antenna is a4.

Referring to FIG. 3 , a side view of the patented dual-band antenna unit 6 of the present invention, the structure includes a second floor 8 , a second medium 9 , and a second microstrip patch 10 .

Referring to Fig. 4, the top view of the single-frequency antenna unit 11 of the patent of the present invention is characterized in that the size of the antenna is reduced by opening two slits on the non-radiating side, and the input port 12 is the feed port of the antenna unit. The width of the single-frequency microstrip antenna unit 11 is a6, the length of the upper left slit and the upper edge of the antenna unit is b3, the width of the upper left slit is b4, and the length is a7, the length of the adjacent side of the upper left slit and the lower left slit is b5, and the length of the upper left slit is b5. The width is b6, the length is a7, the length between the lower left slot and the bottom edge of the antenna unit is b7, the depth of the feeder inserted into the antenna unit is b8, and the width of the slot on both sides of the feeder is a8.

Referring to FIG. 5 , it is a side view of the single-frequency antenna unit 11 of the patent of the present invention. The structure includes a first floor 13 , a first medium 14 , and a first microstrip patch 15 .

The low frequency of the dual-frequency microstrip antenna unit 6 is circularly polarized, and the high frequency is linearly polarized; the single-frequency microstrip antenna unit 11 is linearly polarized.

Below in conjunction with embodiment the patent of the present invention is described in further detail.

The three frequency points used in this embodiment are 1.575 GHz, 1.78 GHz and 2.428 GHz, the dielectric constant of the used dielectric plate is 2.17, the thickness is 1.143 mm, and the loss angle is 0.0009. Among them, the arc length of the upper edge of the conical carrier is 321mm, the arc length of the lower edge is 433mm, and the cutting edge length of the cone is 111.5mm. a1 is 59.8mm, b1 is 62.0mm, a2 is 2.2mm, b2 is 45.7mm, a3 is 1.3mm, a4 is 8.3mm, a5 is 2.0mm; b3 is 8.5mm, b4 is 3.0mm, b5 is 6.0mm, A6 is 56.2mm, a7 is 18.7mm, a8 is 1.1mm, b6 is 3.0mm, b7 is 8.5mm, and b8 is 12.0mm.

Figures 6-7 are reflection coefficient diagrams and omnidirectional axial ratio diagrams corresponding to the dual-band microstrip antenna array, respectively. FIG. 8 is a reflection coefficient diagram corresponding to a single-frequency microstrip antenna array. It can be seen from Figure 6-7 that the dual-band microstrip antenna array meets the requirements of dual-band work, and the axial ratio is lower than 3dB in all directions. It can be seen from Figure 8 that the single-frequency microstrip antenna array meets the single-frequency working requirements.

Claims (6)

1. A triple-frequency dual-polarized conical conformal microstrip antenna array, characterized in that it comprises a conical carrier [1], the first microstrip line [2], the first microstrip antenna array [3], the second microstrip Stripline [4] and the second microstrip antenna array [5], the first microstrip antenna array [3] and the second microstrip antenna array [5] are all arranged on the outer surface of the conical carrier [1], and Evenly surround the surface of the conical carrier, wherein the first microstrip antenna array [3] is located above the second microstrip antenna array [5], wherein the first microstrip antenna array [3] includes four single-frequency microstrip antenna elements [11], the four single-frequency microstrip antenna units [11] are connected in parallel through the first microstrip line [2], and the second microstrip antenna array [5] includes four dual-frequency microstrip antenna units [6], the Four dual-frequency microstrip antenna units [6] are connected in parallel through the second microstrip line [4]. 2. triple-frequency dual-polarization conical conformal microstrip antenna array according to claim 1, is characterized in that, described single-frequency microstrip antenna unit [11] is carried out on radiation side by the first microstrip line [2] Feeding, the dual-frequency microstrip antenna unit [6] is fed on the non-radiating side through the second microstrip line [4]. 3. according to claim 1 and 2 described triple-frequency dual-polarized conical conformal microstrip antenna arrays, it is characterized in that the dual-frequency microstrip antenna unit [6] comprises a second floor [8], a second medium [9] ] and the second microstrip patch [10], the second floor [8] is located below the second medium [9], the second microstrip patch [10] is located above the second medium [9], the second A slit is respectively arranged on the radiation side of the two microstrip patches [10], and the above-mentioned two slits are symmetrical about the vertical center line of the second microstrip patch [10]; the single-frequency microstrip antenna unit [11] includes the first The floor [13], the first medium [14] and the first microstrip patch [15], the first floor [13] is located under the first medium [14], the first microstrip patch [15] is located Above the first medium [14], two slits are opened on the non-radiating side of the first microstrip patch [15], and the single-frequency microstrip antenna unit [11] is symmetrical about the vertical center line. 4. triple-frequency dual-polarization conical conformal microstrip antenna array according to claim 3, is characterized in that, the length of dual-frequency microstrip antenna unit [6] is b1, and width is a1, and the length of slit is b2, The width of the slot is a2, the distance between the left slot and the left edge of the antenna is a5, the feeder width of the antenna unit is a3, the distance between the feeder line of the antenna unit and the right edge of the antenna is a4, and the specific dimensions are: a1 is 59.8mm, b1 is 62.0 mm, a2 is 2.2mm, b2 is 45.7mm, a3 is 1.3mm, a4 is 8.3mm, and a5 is 2.0mm. 5. triple-frequency dual-polarization conical conformal microstrip antenna array according to claim 3, is characterized in that, single-frequency microstrip antenna unit [11] width is a6, and the length of upper left slit and antenna unit upper edge is b3 , the width of the upper left slot is b4, the length is a7, the length of the adjacent side of the upper left slot and the lower left slot is b5, the width of the lower left slot is b6, the length is a7, the length of the lower left slot and the lower edge of the antenna unit is b7, and the feeder is inserted The depth of the antenna unit is b8, the slot width on both sides of the feeder is a8, the specific dimensions are: b3 is 8.5mm, b4 is 3.0mm, b5 is 6.0mm, a6 is 56.2mm, a7 is 18.7mm, a8 is 1.1mm, b6 is 3.0mm, b7 is 8.5mm, and b8 is 12.0mm. 6. triple-frequency dual-polarization conical conformal microstrip antenna array according to claim 3, is characterized in that the thickness of the second medium [9] and the first medium [14] is 1.143mm, and the dielectric constant is equal to 1.143 mm. is 2.17, and the loss angle is 0.0009.

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