CN213212374U - Rodman lens antenna - Google Patents
Rodman lens antenna Download PDFInfo
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- CN213212374U CN213212374U CN202022417927.9U CN202022417927U CN213212374U CN 213212374 U CN213212374 U CN 213212374U CN 202022417927 U CN202022417927 U CN 202022417927U CN 213212374 U CN213212374 U CN 213212374U
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Abstract
The utility model relates to a Rodman lens antenna; the antenna comprises a dielectric substrate, wherein the front part of the dielectric substrate is provided with a Rodamard lens, the rear part of the dielectric substrate is provided with a printed yagi antenna array, the Rodamard lens comprises a metal coating lens cavity, an input port, an output port, a virtual port and N micro-strip delay lines, the metal coating lens cavity, the input port, the output port, the virtual port and the N micro-strip delay lines are arranged on the upper surface of the dielectric substrate, and the output port is connected with the metal coating lens cavity through the N micro; the printed yagi antenna array comprises N excitation arrays and M multiplied by N directing arrays, wherein the N excitation arrays are respectively arranged in front of N columns of directing arrays, each excitation array comprises two parts, one part is arranged on the upper surface of the dielectric substrate, the other part is arranged on the lower surface of the dielectric substrate, and N output ends in the output port of the Rodman lens are respectively connected with one part of the N excitation arrays on the upper surface of the dielectric substrate; the utility model discloses little, the frequency band width of size, loss are low, and in addition, when adopting this antenna to fix a position, the location is more accurate.
Description
The technical field is as follows:
the utility model relates to an antenna, in particular to rod man lens antenna.
(II) background art:
with the rapid development of radar and communication technologies, microwave spectrum resources are becoming crowded, especially in the microwave millimeter wave band. As a key part affecting the performance of radar and communication technologies, high-performance antennas with high gain, low cost and multi-beam scanning are urgently needed. Most of the traditional microstrip array antennas need a complex power synthesis network, and metal loss and radiation loss of microstrip lines are more serious especially when the microstrip array antennas are applied in a millimeter wave frequency band. The antennas for realizing the multi-beam scanning function mainly comprise a phased array antenna and a multi-beam antenna, the phased array antenna can realize accurate pointing and flexible scanning of beams, and a large number of integrated phase shifters, power dividers or directional couplers are required, so the cost is high; due to the unique structure of the multi-beam lens antenna, the multi-beam lens antenna has the characteristics of high gain, high efficiency, low profile, low cost and the like, and although the multi-beam lens antenna has a plurality of advantages, the multi-beam lens antenna has the defects and needs to be further improved.
(III) content of the utility model:
the to-be-solved technical problem of the utility model is: the Rodamard lens antenna has the advantages of small size, wide frequency band and low loss, and can be used for positioning more accurately.
The technical scheme of the utility model:
a Rodman lens antenna comprises a dielectric substrate, wherein a Rodman lens and a printed yagi antenna array are arranged on the dielectric substrate, the Rodman lens is arranged at the front part of the dielectric substrate, and the printed yagi antenna array is arranged at the rear part of the dielectric substrate; the Rodman lens comprises a metal plating lens cavity, an input port, an output port, a virtual port and N micro-strip delay lines, wherein the metal plating lens cavity, the input port, the output port, the virtual port and the N micro-strip delay lines are all arranged on the upper surface of the dielectric substrate; the printed yagi antenna array comprises N excitation arrays and M multiplied by N directing arrays, wherein the M multiplied by N directing arrays are arranged on the upper surface of a dielectric substrate in a matrix form of M rows and N columns, the N excitation arrays are respectively arranged in front of the N columns of directing arrays, each excitation array comprises two parts, one part is arranged on the upper surface of the dielectric substrate, the other part is arranged on the lower surface of the dielectric substrate and is connected with a back metal coating, and the two parts of the excitation arrays are not connected with each other; n output ends of output ports of the Rodman lens are respectively connected with a part of the N excitation arrays on the upper surface of the dielectric substrate, a virtual port of the Rodman lens is connected with a virtual load of 50 ohms, and an input port of the Rodman lens is connected with the excitation circuit through a coaxial cable.
N output ends of the output ports are located on the same straight line.
The guiding array is a transverse conducting line segment printed on the dielectric substrate; each excitation array comprises a left part and a right part, the left part and the right part of the excitation array are transverse conducting line segments printed on the dielectric substrate, the right part of the excitation array is arranged on the upper surface of the dielectric substrate, and the left part of the excitation array is arranged on the lower surface of the dielectric substrate and is connected with the back metal plating layer.
N is 8, M is 5, contains 9 input ports in the input port, contains 8 output ports in the output port, and the virtual load that the virtual port is connected is absorbing material, is used for absorbing the reflection in the metal coating lens cavity to improve antenna performance.
The 8 microstrip delay lines are sequentially arranged on the dielectric substrate from left to right, the microstrip delay lines on the left side and the right side are symmetrically arranged to realize the phase shift function of the microstrip delay lines, and the width and the length of each microstrip delay line are obtained through simulation experiments.
The Rodman lens antenna is a multi-beam lens antenna, a metal coating lens cavity of the Rotman lens is used as a beam forming network, a micro-strip delay line is used as a phase shifter, when the input port of the Rotman lens is fed, a phase difference can be generated on an output port by an output signal through the time delay effect of the metal coating lens cavity and the phase shift of the micro-strip delay line reasonably designed at the rear end of the metal coating lens cavity, the printed yagi antenna array behind the Rotman lens antenna is fed, and therefore multi-beam scanning can be achieved.
The Rodman lens is a direction-finding antenna working in a 2.4G frequency band and provided with 9 wave beams and 8 array ports, and has good wave beam directivity in the whole frequency band and wide-angle scanning of +/-28 degrees. The Rodman lens antenna adopts a single feed port for feeding, the beam width of the antenna is 10 degrees, the beam angle moves by 7 degrees when one feed port is switched, and wide-angle scanning of the antenna at +/-28 degrees is realized by changing the feed port.
The utility model has the advantages that:
1. the utility model discloses a SIW technique is integrated on a medium base plate with the roedman lens and the printing yagi antenna array, and the multi-beam antenna that is formed by the roedman lens can form the multi-beam of fixed angle in the space and point to, can greatly improve and cover radiant power and channel capacity, utilizes the spectrum resource to furthest, compares with current multi-beam lens antenna, the utility model discloses a size is little, the frequency bandwidth, the loss is low, can conveniently integrate with various carriers, can satisfy millimeter wave communication system to the antenna requirement that the antenna is increasingly harsh; moreover, because the utility model discloses a beam angle is narrower (only 5 degree), when adopting it to fix a position, makes the location more accurate.
2. The network structure of the Rodman lens of the utility model is simpler, and the wide-angle scanning is easily realized.
3. The utility model discloses an adjacent wave beam offsets technique, has realized the low side lobe characteristic of antenna.
(IV) description of the drawings:
FIG. 1 is a schematic diagram of a Rodman lens antenna;
FIG. 2 is a rear view of the structure of FIG. 1;
fig. 3 is a schematic diagram illustrating the principle of a rodman lens.
(V) detailed embodiment:
referring to fig. 1 to 3, the rodman lens antenna includes a dielectric substrate 1, a rodman lens and a printed yagi antenna array are disposed on the dielectric substrate 1, the rodman lens is disposed at the front of the dielectric substrate 1, and the printed yagi antenna array is disposed at the rear of the dielectric substrate 1; the Rodman lens comprises a metal plated lens cavity 2, an input port 3, an output port 5, a virtual port 4 and 8 microstrip delay lines 6, wherein the metal plated lens cavity 2, the input port 3, the output port 5, the virtual port 4 and the 8 microstrip delay lines 6 are all arranged on the upper surface of a dielectric substrate 1, a back metal plated layer 10 is arranged on the lower surface of the dielectric substrate 1 and in an area corresponding to the Rodman lens, the input port 3 and the virtual port 4 are directly connected with the metal plated lens cavity 2, and the output port 5 is connected with the metal plated lens cavity 2 through the 8 microstrip delay lines 6; the printed yagi antenna array comprises 8 excitation arrays and 5 × 8 guide arrays 8, wherein the 5 × 8 guide arrays 8 are arranged on the upper surface of the dielectric substrate 1 in a matrix form of 5 rows and 8 columns, the 8 excitation arrays are respectively arranged in front of the 8 columns of guide arrays 8, each excitation array comprises a left part and a right part, the left part and the right part of each excitation array are transverse conductive line segments printed on the dielectric substrate 1, the right part 7-1 of each excitation array is arranged on the upper surface of the dielectric substrate 1, the left part 7-2 of each excitation array is arranged on the lower surface of the dielectric substrate 1 and connected with the back metal plating layer 10, and the two parts of each excitation array are not connected with each other; 8 output ends of output ports 5 of the Rodman lens are respectively connected with a part 7-1 of 8 excitation arrays on the upper surface of the dielectric substrate 1, a virtual port 4 of the Rodman lens is connected with a virtual load of 50 ohms, and an input port 3 of the Rodman lens is connected with an excitation circuit through a coaxial cable.
8 of the output ports 5 are located on the same straight line.
The director array 8 is a transverse section of conductive wire printed on the dielectric substrate 1.
The input port 3 comprises 9 input ends, the output port 5 comprises 8 output ends, and the virtual load connected with the virtual port 4 is a wave-absorbing material and is used for absorbing reflection in the metal plating lens cavity 2 so as to improve the performance of the antenna.
The 8 microstrip delay lines 6 are sequentially arranged on the dielectric substrate 1 from left to right, the microstrip delay lines 6 on the left side and the right side are symmetrically arranged to realize the phase shift function of the microstrip delay lines, and the width and the length of each microstrip delay line 6 are obtained through simulation experiments.
The Rodman lens antenna is a multi-beam lens antenna, a metal coating lens cavity 2 of the Rotman lens is used as a beam forming network, a micro-strip delay line 6 is used as a phase shifter, when the input port 3 of the Rodman lens is fed, a phase difference can be generated by an output signal at an output port 5 through the time delay effect of the metal coating lens cavity 2 and the phase shift of the micro-strip delay line 6 with reasonable design at the rear end, the output signal is fed to a subsequent printed yagi antenna array, and therefore multi-beam scanning can be achieved.
The Rodman lens is a direction-finding antenna working in a 2.4G frequency band and provided with 9 wave beams and 8 array ports, and has good wave beam directivity in the whole frequency band and wide-angle scanning of +/-28 degrees. The Rodman lens antenna adopts a single feed port for feeding, the beam width of the antenna is 10 degrees, the beam angle moves by 7 degrees when one feed port is switched, and wide-angle scanning of the antenna at +/-28 degrees is realized by changing the feed port. The dimensions of the Rodman lens antenna are 723 mm x 588 mm.
The Rodman lens has a central focus and two off-foci, and consists of three contour lines, namely a beam-opening contour C, an array inner contour C1, and an array outer contour C2. The outer array contour C2 is a straight line symmetrical about a coordinate axis, the rear ends of the outer array contour C2 are connected with radiating parts which are all straight lines, and the positions of the beam ports and the positions of the array ports are respectively determined by the beam port contour C and the inner array contour C1. The array inner contour C1 and the array outer contour C2 are connected by adopting microstrip delay lines 6 with different lengths so as to realize target phase shift and feed uniform linear arrays connected with the rear end of the array outer contour C2.
Claims (5)
1. A rodman lens antenna, comprising: the antenna comprises a dielectric substrate, wherein a Rodamard lens and a printed yagi antenna array are arranged on the dielectric substrate, the Rodamard lens is arranged at the front part of the dielectric substrate, and the printed yagi antenna array is arranged at the rear part of the dielectric substrate; the Rodman lens comprises a metal plating lens cavity, an input port, an output port, a virtual port and N micro-strip delay lines, wherein the metal plating lens cavity, the input port, the output port, the virtual port and the N micro-strip delay lines are all arranged on the upper surface of the dielectric substrate; the printed yagi antenna array comprises N excitation arrays and M multiplied by N directing arrays, wherein the M multiplied by N directing arrays are arranged on the upper surface of a dielectric substrate in a matrix form of M rows and N columns, the N excitation arrays are respectively arranged in front of the N columns of directing arrays, each excitation array comprises two parts, one part is arranged on the upper surface of the dielectric substrate, the other part is arranged on the lower surface of the dielectric substrate and is connected with a back metal coating, and the two parts of the excitation arrays are not connected with each other; n output ends of the output ports of the Rodman lens are respectively connected with a part of the N excitation arrays on the upper surface of the dielectric substrate, a virtual port of the Rodman lens is connected with a virtual load, and an input port of the Rodman lens is connected with the excitation circuit.
2. The Rodman lens antenna of claim 1, wherein: n output ends of the output ports are located on the same straight line.
3. The Rodman lens antenna of claim 1, wherein: the guiding array is a transverse conducting line segment printed on the dielectric substrate; each excitation array comprises a left part and a right part, the left part and the right part of the excitation array are transverse conducting line segments printed on the dielectric substrate, the right part of the excitation array is arranged on the upper surface of the dielectric substrate, and the left part of the excitation array is arranged on the lower surface of the dielectric substrate and is connected with the back metal plating layer.
4. The Rodman lens antenna of claim 1, wherein: n is 8, M is 5, and the input port contains 9 input ends.
5. The Rodman lens antenna of claim 4, wherein: the 8 microstrip delay lines are sequentially arranged on the dielectric substrate from left to right, and the microstrip delay lines on the left side and the right side are symmetrically arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022417927.9U CN213212374U (en) | 2020-10-27 | 2020-10-27 | Rodman lens antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022417927.9U CN213212374U (en) | 2020-10-27 | 2020-10-27 | Rodman lens antenna |
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| Publication Number | Publication Date |
|---|---|
| CN213212374U true CN213212374U (en) | 2021-05-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022417927.9U Active CN213212374U (en) | 2020-10-27 | 2020-10-27 | Rodman lens antenna |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113433556A (en) * | 2021-08-26 | 2021-09-24 | 之江实验室 | Solid-state laser radar detection method and device based on Rotman optical lens |
| CN114512824A (en) * | 2022-03-11 | 2022-05-17 | 电子科技大学 | Millimeter wave cross scanning multi-beam array antenna based on co-cavity Rotman lens |
-
2020
- 2020-10-27 CN CN202022417927.9U patent/CN213212374U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113433556A (en) * | 2021-08-26 | 2021-09-24 | 之江实验室 | Solid-state laser radar detection method and device based on Rotman optical lens |
| CN114512824A (en) * | 2022-03-11 | 2022-05-17 | 电子科技大学 | Millimeter wave cross scanning multi-beam array antenna based on co-cavity Rotman lens |
| CN114512824B (en) * | 2022-03-11 | 2023-10-24 | 电子科技大学 | Millimeter wave cross scanning multibeam array antenna based on common cavity rotman lens |
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