CN218385757U - Novel miniaturized multifrequency antenna array - Google Patents

Abstract

The utility model discloses a novel miniaturized multifrequency antenna array, including the antenna structure who realizes various functions, the circuit array who comprises various reflection circuit and parting bead and the circuit plate that comprises phase shift circuit and merit branch circuit, the utility model discloses with high gain antenna and filter antenna technique, through reasonable topological mode, arrange multiple isolation technique again, and distribute above-mentioned technique in multifrequency antenna array, thereby on the one hand make the antenna can be under the circumstances that the assurance array miniaturization, lightweight, each frequency band well work, mutual noninterference, radiate out the electric field of high gain; on the other hand, the four-path oscillators work in the space which can only contain three rows of oscillators originally in the state of higher gain and high isolation, the overall cost is lower, the disassembly is convenient, and the four-path oscillators have very strong competitiveness in a future multi-antenna base station array.

Description

Novel miniaturized multifrequency antenna array

Technical Field

The utility model relates to a wireless communication technology field, specific novel miniaturized multifrequency antenna array that says so.

Background

With the global arrangement of 5G base stations, the available space on the iron tower is less and less, and the integration of 3G/4G/5G base stations is urgent. However, placing antennas of different frequency bands in the same array may cause cross-band interference, which may deteriorate a directional pattern and isolation, and reduce radiation efficiency.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problem, the utility model provides a novel miniaturized multifrequency antenna array, including the extensive array of base station antenna, side reflect array, the novel distribution mode of array element, parting strip, phase shift circuit and merit divide the circuit structure, and the gain is higher than the array of the same kind, and the size is littleer, and the cross polarization relative altitude, it is highly low, the cost is lower, easily production, and make the radiation performance of product promote, have stronger competitiveness in market.

The utility model discloses a following technical scheme realizes:

a miniature multi-frequency antenna array is composed of antenna structure with different functions, circuit array consisting of reflecting circuits and isolating bars, and circuit board consisting of phase-shifting circuit and power divider.

Further, the antenna structure includes: the antenna comprises a high-gain miniaturized dipole antenna working at 0.69-0.96 GHz, a miniaturized dipole filter antenna working at 0.69-0.96 GHz and a half-wave dipole antenna working at 1.7-2.7 GHz.

Furthermore, the high-gain miniaturized dipole antenna and the miniaturized dipole filter antenna are positioned on the array centerline and on the same axis, and the high-gain miniaturized dipole antenna and the miniaturized dipole filter antenna jointly complete the work of one path of base station antenna; the half-wave dipole antennas are divided into four groups which are symmetrical about the central axis of the array, and the four groups of half-wave dipole antennas have level differences in the longitudinal direction.

Furthermore, the high-gain miniaturized dipole antennas are located at two ends of the same row of miniaturized dipole filter antennas, two rows of half-wave dipole antennas are located at two sides of the high-gain miniaturized dipole antennas and two sides of the miniaturized dipole filter antennas respectively, two rows of half-wave dipole antennas are further arranged below the miniaturized dipole filter antennas, four dipole arms of the miniaturized dipole filter antennas respectively and correspondingly extend to positions above the half-wave dipole antennas located on the center line of the array, and the half-wave dipole antennas located on the center line of the array and the half-wave dipole antennas located at two sides of the miniaturized dipole filter antennas are arranged in a staggered mode.

Furthermore, the high-gain miniaturized dipole antenna is composed of two parts: one part is a high-gain dipole without a filter circuit structure, and the other part is a feed circuit module I used for connecting the oscillator and the circuit module.

Furthermore, the miniaturized dipole filter antenna comprises four parts: the first part is a dipole radiation surface with a small circuit size and a band-stop filter circuit structure arranged on the first part, the dielectric constant of the dipole radiation surface is 3.0, the shape of the substrate is butterfly, the circuit on the dipole radiation surface consists of four parts which are symmetrical about an axis, two opposite parts form a group of dipoles, two adjacent parts are orthogonal, and the whole dipole radiation surface is a dual-polarized dipole radiation surface;

the second part is two impedance matching circuits and a balun circuit which are connected with the radiating surface of the oscillator, and the two impedance matching circuits and the balun circuit are mutually orthogonal and are respectively connected with two mutually orthogonal polarization circuits on the radiating surface of the oscillator;

the third part is a lead substrate placed on the ground, and a 50 omega circuit connected with two impedance matching circuits and a balun circuit is distributed on the lead substrate, and the two impedance matching circuits and the balun circuit are respectively inserted on the lead substrate; the other end of the lead substrate is connected with an external circuit module, and the fourth part is a plastic piece for supporting the whole antenna structure.

Further, the half-wave dipole antenna is composed of four parts: the first part is a die-casting vibrator; the second part is two balun substrates which are embedded in the oscillator and coupled with the oscillator; the third part is a guide piece at the position 10mm above the vibrator; the fourth part is a feed circuit module II which is used for connecting the oscillator and the power division feed network.

Further, the circuit array includes: spacer and reflective strips operating at 1.7-2.7GHz, and reflective arrays operating at 0.69-2.7 GHz.

Furthermore, the isolation strips are distributed among the antenna structures in each column and are made of aluminum strips; the reflection bands are distributed on the outer side of the array and are made of aluminum plates; the reflective array is positioned above the reflective strip and consists of various circuits printed on a PCB board.

Further, the circuit board block includes: two phase-shifting circuits working at 1.7-2.7GHz, two power division feed networks working at 1.7-2.7GHz and a circuit module working at 0.69-0.96 GHz.

The beneficial effects of the utility model reside in that:

(1) The utility model greatly reduces the interference of the antenna applied to the 3G/4G/5G base station antenna for a certain working frequency band to the antennas working in other rows and columns on the basis of ensuring the miniaturization of the array;

(2) The broadband filtering antenna is adopted, so that electric waves with the same polarization or non-same polarization from other frequency bands are effectively filtered;

(3) The high-gain antenna and the filter antenna are combined to form an array, so that the gain of the antenna array is increased under the condition that the other frequency band antennas work normally, and meanwhile, the cost and the weight of the antenna are controlled;

(4) Through a novel topological mode, the four oscillators work in a space which can only contain three rows of oscillators originally in a state of higher gain and high isolation;

(5) When the array topology is too small, the conventional reflector cannot generate good reflection effect on the antenna. The utility model provides a reflection technology, which effectively reduces the wave width of the antenna and improves the gain of the whole working frequency band;

(6) For the antenna working at 1.7-2.7GHz, a special topological mode is adopted, and the integral gain is kept at a higher level under the condition of ensuring that the isolation between any two rows of the antenna reaches the standard.

Drawings

Fig. 1 is a diagrammatic view of a complete array model of the present invention, in which an antenna structure 1 and a circuit array 2 are shown in solid lines and a circuit board block 3 is shown in dashed lines;

fig. 2 is a schematic structural diagram of the high-gain miniaturized dipole antenna of the present invention;

fig. 3 is a schematic structural diagram of the miniaturized dipole filter antenna of the present invention;

fig. 4 is a schematic structural view of a half-wave dipole antenna of the present invention;

fig. 5 is a schematic structural view of the parting strip of the present invention;

fig. 6 is a schematic structural view of the reflection band of the present invention;

fig. 7 is a schematic structural diagram of a reflection array of the present invention;

FIG. 8 shows the distribution of four high-gain dipoles of the present invention working at 1.7-2.7 GHz;

reference numerals: 1. the antenna structure comprises 11 high-gain miniature dipole antennas 111, high-gain dipoles 112, feeder circuit modules I and 12, miniature dipole filter antennas 121, dipole radiating surfaces 124, lead substrates 13, half-wave dipole antennas 131, die-cast oscillators 132, balun substrates 133, guide pieces 134, feeder circuit modules II and 2, a circuit array 21, isolation strips 22, reflection bands 23, reflection arrays 3 and a circuit board block.

Detailed Description

The technical solution in the embodiment of the present invention is clearly and completely described below with reference to the accompanying drawings.

Example 1

As shown in fig. 1, a novel miniaturized multi-frequency antenna array includes an antenna structure 1 for implementing various functions, a circuit array 2 composed of various reflection circuits and isolation bars, and a circuit board 3 composed of a phase shift circuit and a power dividing circuit.

As shown in fig. 1, the antenna structure 1 includes: the antenna comprises a high-gain miniaturized dipole antenna 11 working at 0.69-0.96 GHz, a miniaturized dipole filter antenna 12 working at 0.69-0.96 GHz, a broadband filter antenna, a half-wave dipole antenna 13 working at 1.7-2.7GHz, and a combination array of the high-gain antenna and the filter antenna, wherein the high-gain miniaturized dipole antenna 11 and the half-wave dipole antenna work at 0.69-0.96 GHz respectively, so that the gain of an antenna array is increased under the condition of ensuring the normal work of other frequency band antennas, and the cost and the weight of the antenna are controlled;

as shown in fig. 1, a plurality of high-gain miniaturized dipole antennas 11 and miniaturized dipole filter antennas 12 are all located on the same axis and on the center line of the array, and both complete the operation of one path of base station antenna;

as shown in fig. 1 or 7, the half-wave dipole antennas 13 are divided into four groups, which are respectively designated as 13A, 13B, 13C and 13D, and respectively perform different operations, wherein 13A, 13B and 13C, 13D are symmetrical with respect to the central axis of the array, and the four groups of half-wave dipole antennas 13 have level differences in the longitudinal direction;

specifically, as shown in fig. 1, the high-gain miniaturized dipole antennas 11 are located at two ends of the same row of miniaturized dipole filter antennas 12, two rows of half-wave dipole antennas 13 are located at two sides of the high-gain miniaturized dipole antennas 11 and the miniaturized dipole filter antennas 12, respectively, two rows of half-wave dipole antennas 13 are further disposed below the miniaturized dipole filter antennas 12, four dipole arms of the miniaturized dipole filter antennas 12 extend to positions above the half-wave dipole antennas 13 located on the center line of the array, and the half-wave dipole antennas 13 located on the center line of the array and the half-wave dipole antennas 13 located at two sides of the miniaturized dipole filter antennas 12 are arranged in a staggered manner in the radial direction, so that a group of array forms can achieve a good spatial multiplexing effect; mutual coupling among the arrays is further reduced, and a better isolation effect is obtained;

as shown in fig. 2, the high-gain miniaturized dipole antenna 11 is composed of two parts: one part is a high-gain dipole 111 with low cost, small size and no need of a filter circuit structure, and is realized by adopting an integrated die-casting vibrator; the other part is a feed circuit module I112 for connecting the oscillator and the circuit module 33.

As shown in fig. 3, the miniaturized dipole filtering antenna 12 is composed of four parts: the first part is a dipole radiation surface 121 with a small circuit size and a band-stop filter circuit structure arranged on the first part, the dielectric constant of the dipole radiation surface 121 is 3.0, the shape of a substrate is butterfly, a circuit on the dipole radiation surface 121 consists of four parts which are symmetrical about an axis, two opposite parts form a group of dipoles, two adjacent parts are orthogonal to each other, and the whole dipole radiation surface 121 is a dual-polarized dipole radiation surface; two oscillator arms at opposite angles of the dipole radiation surface 121 are polarized in one group, the two groups of the oscillator arms are opposite in polarization direction, and the two groups of the oscillator arms are orthogonally arranged to form polarization direction distribution of plus and minus 45 degrees;

the second part is two paths of impedance matching circuits and balun circuits 122 and 123 connected with the oscillator radiation surface 121, the two paths of impedance matching circuits and balun circuits 122 and 123 are mutually orthogonal and are respectively connected with two mutually orthogonal polarization circuits connected with the oscillator radiation surface 121, and the radiation of +/-45-degree polarization electric fields of the antenna in space can be controlled;

the third part is a lead substrate 124 placed on the ground, on which a 50 Ω circuit connected with two impedance matching circuits and balun circuits 122 and 123 is distributed, and the two impedance matching circuits and balun circuits 122 and 123 are respectively inserted on the lead substrate 124; the other end of the lead substrate 124 is connected to the external circuit module 33; the fourth portion is a plastic piece that supports the entire antenna structure 12.

As shown in fig. 4, the half-wave dipole antenna 13 is composed of four parts: the first part is a die-cast vibrator 131 with lower cost and smaller size; the second part is two balun substrates 132 which are embedded in the oscillator and coupled with the oscillator; the third part is a guide sheet 133 at the position 10mm above the vibrator 131; the fourth part is a feed circuit module II 134 which connects the oscillator and the power division feed network.

As shown in fig. 5 to 7, the circuit array 2 includes: a spacer 21 and a reflective strip 22 operating at 1.7-2.7GHz, and a reflective array 23 operating at 0.69-2.7 GHz.

The isolation strips 21 are distributed among each row of antenna structures 13 and are made of aluminum strips, even if the intervals among the array elements are small, no obvious coupling effect can be generated through the arrangement of the isolation strips 21, and the reflection bands 22 are distributed on the outer side of the array and are made of aluminum plates; a reflective array 23 is above the reflective tape 22, consisting of various circuits printed on a PCB board.

As shown in fig. 1 and 7, the circuit board block 3 includes: two phase shift circuits 311 and 312 working at 1.7-2.7GHz, two power division feed networks 321 and 322 working at 1.7-2.7GHz, a circuit module 33 composed of a phase shift circuit and a power division circuit working at 0.69-0.96 GHz, and plus or minus 45-degree polarization feed for the antenna unit respectively.

To sum up, the utility model discloses with high-gain antenna and filtering antenna technique, through reasonable topological mode, arrange multiple isolation technique again, and distribute above-mentioned technique in the multifrequency antenna array, thereby on the one hand make the antenna can guarantee that the array is miniaturized, lightweight, each frequency band well work, under the mutual noninterference's the condition, radiate out the electric field of high-gain; on the other hand, the four-path oscillators work in the space which can only contain three rows of oscillators originally in the state of higher gain and high isolation, the overall cost is lower, the disassembly is convenient, and the four-path oscillators have very strong competitiveness in a future multi-antenna base station array.

The foregoing shows and describes the basic principles, essential features and advantages of the present invention, and it will be understood by those skilled in the art that the present invention is not limited by the foregoing embodiments, and that what has been described in the foregoing embodiments and specification is merely illustrative of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention, as defined in the appended claims and their equivalents.

Claims (6)

1. A novel miniaturized multi-frequency antenna array is characterized in that: the antenna comprises an antenna structure (1), a circuit array (2) consisting of a reflecting circuit and a separation strip, and a circuit board block (3) consisting of a phase-shifting circuit and a power dividing circuit;

the antenna structure (1) comprises: the high-gain miniaturized dipole antenna (11) working at 0.69-0.96 GHz, the miniaturized dipole filter antenna (12) working at 0.69-0.96 GHz, the half-wave dipole antenna (13) working at 1.7-2.7GHz, and the high-gain miniaturized dipole antenna (11) and the miniaturized dipole filter antenna (12) are both positioned on the middle line of the array and on the same axis, and both complete the work of one path of base station antenna; the half-wave dipole antennas (13) are divided into four groups, the four groups of half-wave dipole antennas are symmetrical about the central axis of the array, and the four groups of half-wave dipole antennas (13) have level differences in the longitudinal direction;

the circuit array (2) comprises: a spacer (21) and a reflective strip (22) operating at 1.7-2.7GHz, and a reflective array (23) operating at 0.69-2.7 GHz;

the circuit board block (3) comprises: two phase shift circuits working at 1.7-2.7GHz, two power division feed networks working at 1.7-2.7GHz and a circuit module (33) working at 0.69-0.96 GHz.

2. The novel miniaturized multi-frequency antenna array of claim 1, wherein: the high-gain miniaturized dipole antenna (11) is located at two ends of the same-row miniaturized dipole filter antenna (12), two rows of half-wave dipole antennas (13) are located at two sides of the high-gain miniaturized dipole antenna (11) and the miniaturized dipole filter antenna (12) respectively, two rows of half-wave dipole antennas (13) are further arranged below the miniaturized dipole filter antenna (12), four dipole arms of the miniaturized dipole filter antenna (12) correspondingly extend to the positions above the half-wave dipole antennas (13) located on the central line of the array respectively, and the half-wave dipole antennas (13) located on the central line of the array and the half-wave dipole antennas (13) located at two sides of the miniaturized dipole filter antenna (12) are arranged in a staggered mode.

3. The novel miniaturized multi-frequency antenna array of claim 1, wherein: the high-gain miniaturized dipole antenna (11) is composed of two parts: one part is a high-gain dipole (111) which does not need a filter circuit structure, and the other part is a feeding circuit module I (112) for connecting the oscillator and the circuit module (33).

4. The novel miniaturized multi-frequency antenna array of claim 1, wherein: the miniaturized dipole filter antenna (12) is composed of four parts: the first part is a small-size circuit and is provided with a dipole radiation surface (121) with a band-stop filter circuit structure, the dielectric constant of the dipole radiation surface (121) is 3.0, the shape of a substrate is butterfly, the circuit on the dipole radiation surface (121) is composed of four parts which are symmetrical about an axis, two opposite parts are a group of dipoles, two adjacent parts are orthogonal, and the whole dipole radiation surface (121) is a dual-polarized dipole radiation surface;

the second part is two impedance matching circuits and a balun circuit which are connected with the dipole radiation surface (121), and the two impedance matching circuits and the balun circuit are mutually orthogonal and are respectively connected with two mutually orthogonal polarization circuits on the dipole radiation surface (121);

the third part is a lead substrate (124) placed on the ground, a 50 omega circuit for connecting two impedance matching circuits and a balun circuit is distributed on the lead substrate, and the two impedance matching circuits and the balun circuit are respectively inserted on the lead substrate; the other end of the lead substrate (124) is connected with an external circuit module (33), and the fourth part is a plastic piece for supporting the whole miniaturized dipole filter antenna (12).

5. The novel miniaturized multi-frequency antenna array of claim 1, wherein: the half-wave dipole antenna (13) is composed of four parts: the first part is a die-cast vibrator (131); the second part is two balun substrates (132) which are embedded in the oscillator and coupled with the oscillator; the third part is a guide sheet (133) which is 10mm above the vibrator (131); the fourth part is a feed circuit module II (134) which connects the oscillator and the power division feed network.

6. The novel miniaturized multi-frequency antenna array of claim 1, wherein: the isolating strips (21) are distributed among each column of half-wave dipole antennas (13) and are made of aluminum strips; the reflection bands (22) are distributed on the outer side of the array and are made of aluminum plates; the reflective array (23) is above the reflective strip (22) and consists of printed circuitry on a PCB board.

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