Out-of-band coupled antenna combined by fine-and-straight antenna and bow-tie antenna

Abstract

An out-of-band coupled antenna combined by fine-and-straight antenna and bow-tie antenna is provided, including: a dielectric slab (1), an AA radiation element (2) provided on an upper plate (1A) of the dielectric slab (1) by a , a cooper pouring process, a BA radiation element (3), an A feeder line (4) and a B feeder line (5); an AB radiation element (8) provided on a lower plate (1B) of the dielectric slab (1), a BB radiation element (9), a C feeder line feeder (6) and a D feeder line (7); a first sensor (10A) and a second sensor (10B) which are connected on the AA radiation element (2); a third sensor (10C) and a fourth sensor (10D) which are connected on the AB radiation element (8). The antenna is capable of suppressing out-of-band coupling between indication elements to improve the separation degree.

Claims

1. An out-of-band coupled antenna combined by a fine-and-straight antenna and a bow-tie antenna, comprising: a dielectric slab (1), an AA radiation element (2); an AB radiation element (8), a BA radiation element (3), a BB radiation element (9), an A feeder line (4), a B feeder line (5), a C feeder line (6), a D feeder line (7), a first sensor (10A), a second sensor (10B), a third sensor (10C) and a fourth sensor (10D); wherein the AA radiation element (2) and the AB radiation element (8) have an identical structure with each other and form the bow-tie antenna; wherein the BA radiation element (3) and the BB radiation element (9) have an identical structure with each other and form the fine-and-straight antenna; wherein the AA radiation element (2), the BA radiation element (3), the A feeder line (4), the B feeder line (5) are provided on the upper plate (1A) of the dielectric slab (1) by a cooper pouring process; wherein a cooper covering thickness thereof is 0.018-0.035 mm; wherein the AB radiation element (8), the BB radiation element (9), the C feeder line (6) and the D feeder line (7) are provided on a lower plate (1B) of the dielectric slab (1) by a cooper pouring process, wherein a cooper covering thickness thereof is 0.018-0.035 mm; wherein an A isolation groove (2A) is provided on the AA radiation element (2), the A isolation groove (2A) does not have a cooper covering layer; a first sensor (10A) and a second sensor (10B) are respectively provided on two ends of the A isolation groove (2A); wherein a B isolation groove (8A) is provided on the AB radiation element (8), the B isolation groove (8A) does not have a cooper covering layer; a third sensor (10C) and a fourth sensor (10D) are respectively provided on two ends of the B isolation groove (8A);

2. The out-of-band coupled antenna combined by the fine-and-straight antenna and the bow-tie antenna, as recited in claim 1, wherein the A isolation groove (2A) and the B isolation groove (8A) are respectively provided on a three-quarter distance between an upper bottom edge and a lower bottom edge of the AA radiation element (2) and the AB radiation element (8).

3. The out-of-band coupled antenna combined by the fine-and-straight antenna and the bow-tie antenna, as recited in claim 1, wherein the out-of-band coupled antenna has a wavelength at a range of 50 mm-5000 mm as a size constraint.

4. The out-of-band coupled antenna combined by the fine-and-straight antenna and the bow-tie antenna, as recited in claim 3, wherein a size constraint of the out-of-band coupled antenna is: a.sub.1=(0.8˜1.5) λ, b.sub.1=(0.4˜0.8) λ; a.sub.2upper=a.sub.8upper=(0.005˜0.01) λ, a.sub.2lower=a.sub.8lower=1.15 b.sub.2 , b.sub.2=b.sub.8=(0.1˜0.2) λ, a.sub.2groove=a.sub.8groove=(0.005˜0.01) λ, b.sub.2cut=¾ b.sub.2, b.sub.8cut=¾ b.sub.8; a.sub.3=a.sub.9=(0.005˜0.01) λ, b.sub.3=b.sub.9=(0.2˜0.3) λ; a.sub.4=a.sub.5=a.sub.6=a.sub.7=(0.25˜0.5) λ; b.sub.4=b.sub.5=b.sub.6upper=b.sub.7upper=0.0075 λ; b.sub.7lower=b.sub.6lower=0.03 λ; b.sub.4-5=b.sub.6-7=(0.3˜0.5) λ.

5. The out-of-band coupled antenna combined by the fine-and-straight antenna and the bow-tie antenna, as recited in claim 1, wherein the AA radiation element (2) and the AB radiation element (8) are in a shape of a trapezoidal and particularly an isosceles trapezoidal.

6. The out-of-band coupled antenna combined by the fine-and-straight antenna and the bow-tie antenna, as recited in claim 1, wherein the AA radiation element (2) and the AB radiation element (8) are in a shape of an isosceles trapezoidal.

7. The out-of-band coupled antenna combined by the fine-and-straight antenna and the bow-tie antenna, as recited in claim 1, wherein a value the first sensor (10A), the second sensor (10B), the third sensor (10C) and the fourth sensor (10D) adopted by the out-of-band coupled antenna is at a range of 2.2 nH-120 nH.

8. The out-of-band coupled antenna combined by the fine-and-straight antenna and the bow-tie antenna, as recited in claim 1, wherein a feeding mode of the out-of-band coupled antenna is side-fed.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0023] FIG. 1 is a structural sketch view of an upper plate of a .wide-band bow-tie antenna utilizing inductance load to suppress out-of-band coupling.

[0024] FIG. 1A is a structural view of a lower plate of the wide-band bow-tie antenna utilizing inductance load to suppress out-of-band coupling.

[0025] FIG. 2 is a first front view of a radiation element of the present invention.

[0026] FIG. 2A is a first front view of a radiation element of the present invention.

[0027] FIG. 2B is a size marking sketch view of radiation elements which are on a middle and upper portion.

[0028] FIG. 2C is a size marking sketch view of radiation elements which are on a middle and lower portion.

[0029] FIG. 3A is an S11 parameter diagram of an antenna with a size of the Embodiment 1.

[0030] FIG. 3B is an S12 parameter diagram of an antenna with the size of the Embodiment 1.

[0031] FIG. 3C is an S22 parameter diagram of an antenna with the size of the Embodiment 1.

[0032] FIG. 4A is an E-direction view of the antenna with the size of the Embodiment 1.

[0033] FIG. 4B is an H-direction view of the antenna with the size of the Embodiment 1.

[0034] FIG. 5 is a S12 parameter view of the antenna with the size of the Embodiment 1 with different inductance loading values.

[0035] FIG. 6 is a front view of another radiation element part of the present invention.

TABLE-US-00001  1. dielectric slab  1A-upper plate  1B-lower plate  2-AA radiation element  2A-A isolation  3-BA radiation element groove  4-A feeder line  5-B feeder line  6-C feeder line  7-D feeder line  8-AB radiation  8A-B isolation groove element  9-BB radiation element 10A-A inductor 10B-B sensor 1OC-C sensor 10D-D sensor 20-AC radiation element 80-AD radiation element

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

[0036] Further description of the present invention is illustrated combining with the preferred embodiments and the accompany drawings.

[0037] Referring to FIG. 1, as shown in FIG. 1A, the present invention designs an out-of-band coupled antenna combined by a fine-and-straight antenna and a bow-tie antenna, comprising: a dielectric slab 1, an AA radiation element 2; an AB radiation element 8, a BA radiation element 3, a BB radiation element 9, an A feeder line 4, a B feeder line 5, a C feeder line 6, a D feeder line 7, a first sensor 10A, a second sensor 10B, a third sensor 10C and a fourth sensor 10D. The AA radiation element 2 and the AB radiation element 8 have an identical structure with each other and form the bow-tie antenna (See FIG. 2 and FIG. 2A). The BA radiation element 3 and the BB radiation element 9 have an identical structure with each other and form the fine-and-straight antenna (See FIG. 2 and FIG. 2A).

[0038] A feeding mode of the out-of-band coupled antenna combined by the fine-and-straight antenna and the bow-tie antenna is side-fed.

[0039] In the present invention, the first sensor 10A, the second sensor 10B, the third sensor 10C and the fourth sensor 10D all adopt LQW18AN_00 series sensors manufactured by Murata Corporation of Japan. A value the first sensor 10A, the second sensor 10B, the third sensor 10C and the fourth sensor 10D is at a range of 2.2 nH-120 nH.

[0040] The AA radiation element 2, the BA radiation element 3, the A feeder line 4, the B feeder line 5 are provided on the upper plate 1A of the dielectric slab 1 by a cooper covering technique; wherein a cooper covering thickness thereof is 0.018-0.035 mm.

[0041] The AB radiation element 8, the BB radiation element 9, the C feeder line 6 and the D feeder line 7 are provided on a lower plate 1B of the dielectric slab 1, wherein a cooper covering thickness thereof is 0.018-0.035 mm.

[0042] In the present invention, the AA radiation element 2 is in a shape of a trapezoidal, and more particularly, an isosceles trapezoidal. An isolation groove 2A is provided on the AA radiation element 2 by a cutting process, the A isolation groove 2A does not have a cooper covering layer; a first sensor 10A and a second sensor 10B are respectively provided on two ends of the A isolation groove 2A (See FIG. 1). The A isolation groove 2A is provided on a three-quarter distance between an upper bottom edge and a lower bottom edge of the AA radiation element 2, i.e., b.sub.2cut=¾b.sub.2, wherein b.sub.2cut represents a distance between the upper bottom edge and the A isolation groove 2A, which is named a cutting position of the A isolation groove 2A; b.sub.2 represents a distance between the upper bottom edge and the lower bottom edge of the AA radiation element 2.

[0043] As shown in FIG. 1, a length of the dielectric slab 1 is denoted as a.sub.1, a width of the dielectric slab 1 is denoted as b.sub.1 and a thickness of the dielectric slab 1 is at a range of 0.5-1.5 mm.

[0044] As shown in FIG. 2B, a length of the lower bottom edge of the AA radiation element 2 is denoted as a.sub.2lower; a length of the upper bottom edge of the AA radiation element 2 is denoted as a.sub.2upper; a distance between the upper bottom edge and the lower bottom edge of the AA radiation element 2 is denoted as b.sub.2; a width of the A isolation groove 2A of the AA radiation element 2 is denoted as a.sub.2groove, and a cutting position of the A isolation groove 2A is denoted as b.sub.2cut.

[0045] As shown in FIG. 2B, a length of the BA radiation element 3 is denoted as a.sub.3, and a width of the BA radiation element 3 is denoted as b.sub.3.

[0046] As shown in FIG. 2B, a length of the A feeder line 4 is denoted as a.sub.4 ; and a width of the A feeder line 4 is b.sub.4.

[0047] As shown in FIG. 2B, a length of the B feeder line 5 is denoted as a.sub.5, a width of the B feeder line 5 is denoted as b.sub.5; and an opposite distance between the A feeder line 4 and the B feeder line 5 is denoted as b.sub.4-5.

[0048] As shown in FIG. 2B, a length of the lower bottom edge of the AB radiation element 8 is denoted as a.sub.8lower; a length of the upper bottom edge of the AB radiation element 8 is denoted as a.sub.8upper; a distance between the upper bottom edge and the lower bottom edge of the AB radiation element 8 is denoted as b.sub.8; a width of the B isolation groove 8A on the AB radiation element 8 is denoted as a.sub.8groove, and a cutting position of the B isolation groove 8A is denoted as b.sub.8cut.

[0049] As shown in FIG. 2B, a length of the BB radiation element 9 is denoted as a.sub.9, and a width of the BA radiation element 3 is denoted as b.sub.9.

[0050] As shown in FIG. 2B, a length of the C feeder line 6 is denoted as a.sub.6; and a width of an upper bottom edge of the C feeder line 6 is denoted as b.sub.6upper; and a width of the lower bottom edge of the C feeder line 6 is denoted as b.sub.6lower.

[0051] As shown in FIG. 2B, a length of the D feeder line 5 is denoted as a.sub.7, a width of an upper bottom edge of the D feeder line 7 is denoted as b.sub.7upper, a width of a lower bottom edge of the D feeder line 7 is denoted as b.sub.7lower. An opposite distance between the C feeder line 6 and the D feeder line 7 is denoted as b.sub.6-7.

[0052] Size Constraint of Configuration of Cooper Pour

[0053] In the present invention, considering practical application scene of the antenna, a wavelength at a range of 50 mm-5000 mm serves as a size constraint of the antenna:

a.sub.1=(0.8˜1.5) λ, b.sub.1=(0.4˜0.8) λ;
a.sub.2upper=a.sub.8upper=(0.005˜0.01) λ, a.sub.2lower=a.sub.8lower=1.15 b.sub.2 , b.sub.2=b.sub.8=(0.1˜0.2) λ, a.sub.2groove=a.sub.8groove=(0.005˜0.01) λ, b.sub.2cut=¾ b.sub.2, b.sub.8cut=¾ b.sub.8;
a.sub.3=a.sub.9=(0.005˜0.01) λ, b.sub.3=b.sub.9=(0.2˜0.3) λ;
a.sub.4=a.sub.5=a.sub.6=a.sub.7=(0.25˜0.5) λ;
b.sub.4=b.sub.5=b.sub.6upper=b.sub.7upper=0.0075 λ;
b.sub.7lower=b.sub.6lower=0.03 λ;
b.sub.4-5=b.sub.6-7=(0.3˜0.5) λ.

Embodiment 1

[0054] A thickness of cooper pouring of the radiation elements and the feeder lines manufactured by a cooper pouring technique is 0.0035 cm. In the Embodiment 1, a size of the dielectric slab is: a.sub.1=175 cm, b.sub.1=82 cm; and a height of the dielectric slab is 0.08 cm.

[0055] A size of the fine-and-straight antenna in the Embodiment 1 is: a.sub.3=a.sub.9=1 cm, b.sub.3=b.sub.9=43 cm, a.sub.5=a.sub.7=50 cm, b.sub.5=b.sub.7upper=1.5 cm and b.sub.7lower=6 cm.

[0056] In the embodiment 1, a size of the bow-tie antenna, i.e., the AA radiation element 2 and the AB radiation element 8 are in cooper pouring configuration of isosceles trapezoidal, is: a.sub.4=a.sub.6=50 cm, b.sub.4=b.sub.6upper=1.5 cm, b.sub.6lower=6 cm, a.sub.2upper=a.sub.8upper=1 cm, a.sub.2lower=a.sub.8lower=35.6 cm, b.sub.2=b.sub.8=31 cm, a.sub.2groove=a.sub.8groove=2 cm. The cutting position of the A isolation groove 2A is on three quarters of b.sub.2, i.e., 23.25 cm. The cutting position of the B isolation groove 8A is on three quarters of b.sub.8, i.e., 23.25 cm.

[0057] In the Embodiment 1, S-parameter is utilized for performance evaluation in. Dotted line in the Figure represents a conventional antenna wherein inductance is not loaded on the AA radiation element 2 and the AB radiation element 8. The solid lines represent the antennas designed in the Embodiment 1.

[0058] As shown in FIG. 3A, the parameter S11 represents the operation performance of the bow-tie antenna, wherein the performance before and after loading the inductance and at a working frequency of 140 MHz is not changed.

[0059] As shown in FIG. 3B, the present invention uses S12 to evaluate the isolation degree between the bow-tie antenna and the fine-and-straight antenna. As shown in FIG. 3B, coupling degree of the conventional antenna under a working frequency is −19 dB. However, in the Embodiment 1, the coupling degree is reduced to −30 dB, with a 11 dB decline. Coupling degree S12 at a frequency of 290 MHz is suppressed by over 20 dB.

[0060] As shown in FIG. 3C, parameter S22 represents working performance of the fine-and-straight antenna, the performance of S22 is basically un-changed before and after loading the inductance at a working frequency of 280 MHz.

[0061] Performance evaluation is performed on the Embodiment 1 before and after loading the inductive by a directional diagram. The dotted lines in the Figs represent a conventional antenna, and the solid line represents the antenna designed in the Embodiment 1. It can be seen from the E-plane diagram of the FIG. 4A that: under a working frequency of 140 MHz, the radiation performance of the E-plane antenna is not influenced. It can be seen from the H-plane directional diagram of the FIG. 4B that the radiation performance of the H-plane antenna is not influenced at a working frequency of 140 MHz.

[0062] In the Embodiment 1 of the present invention, at the working frequency of 280 MHz, the variation curve of the S12 with the loading inductance is as shown in FIG. 5, wherein at a point with an inductance of 74 nH, mutual coupling is significantly suppressed, and S12 is the optimum.

Embodiment 2

[0063] A thickness of cooper pouring of the radiation elements and the feeder lines manufactured by a cooper pouring technique is 0.0035 cm. Structural size of the Embodiment 2 is identical to the Embodiment 1, and the only difference lies in the shape of the trapezoidal of the bow-tie antenna, i.e., the shape of the trapezoidal of the AC radiation element 20 and the AD radiation element 80 has a cathetus and a bevel edge (See FIG. 6).

[0064] In the Embodiment 2, S-parameter is utilized for performance evaluation in. Dotted line in the Figure represents a conventional antenna wherein inductance is not loaded on the AC radiation element 20 and the AD radiation element 80. The solid lines represent the antennas designed in the Embodiment 2.

[0065] The parameter S11 represents the operation performance of the bow-tie antenna, wherein the performance before and after loading the inductance and at a working frequency of 200 MHz is not basically changed.

[0066] The present invention uses S12 to evaluate the isolation degree between the bow-tie antenna and the fine-and-straight antenna. Coupling degree of the conventional antenna under a working frequency is −12 dB. However, in the Embodiment 2, the coupling degree is reduced to −20 dB, with a 8 dB decline.

[0067] In the present invention, parameter S22 represents working performance of the fine-and-straight antenna, and the performance of S22 is basically un-changed before and after loading the inductance at a working frequency of 280 MHz.

[0068] Performance evaluation is performed on the Embodiment 2 before and after loading the inductive by a directional diagram. The dotted lines in the Figs represent a conventional antenna, and the solid line represents the antenna designed in the Embodiment 2. It can be seen from the E-plane diagram that: under a working frequency of 200 MHz, the radiation performance of the E-plane antenna is not influenced.

[0069] In the Embodiment 2, at a point with an inductance of 68 nH, mutual coupling is significantly suppressed, and S12 is the optimum.

[0070] One skilled in the art will understand that the embodiment of the present invention as shown in the drawings and described above is exemplary only and not intended to be limiting.

[0071] It will thus be seen that the objects of the present invention have been fully and effectively accomplished. Its embodiments have been shown and described for the purposes of illustrating the functional and structural principles of the present invention and is subject to change without departure from such principles. Therefore, this invention includes all modifications encompassed within the spirit and scope of the following claims.