CN210742489U - Radio frequency front end receiving and transmitting device and vehicle-mounted radar receiving and transmitting system - Google Patents
Radio frequency front end receiving and transmitting device and vehicle-mounted radar receiving and transmitting system Download PDFInfo
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Abstract
The utility model relates to a radar technical field, concretely relates to radio frequency front end transceiver, on-vehicle radar send-receive system. The radio frequency front end transceiver includes: an antenna array; the transceiver unit is electrically connected with the antenna array and is used for transceiving electromagnetic wave signals through the antenna array; the antenna array comprises a transmitting antenna used for transmitting the electromagnetic wave signal, and the signal transmission direction of at least part of the transmitting antenna is different from the polarization direction; through the transmitting antenna who uses polarization direction and signal transmission direction dissimilarity promptly, can effectively promote the flexibility of putting and overall arrangement of antenna array, and under the prerequisite of ensureing antenna receiving and dispatching signal performance, can also effectively reduce the shared area of whole antenna array, and then reach and reduce antenna and on-vehicle radar receiving and dispatching system size purpose.
Description
Technical Field
The utility model relates to a radar technical field, concretely relates to radio frequency front end transceiver, on-vehicle radar send-receive system.
Background
Radars are electronic devices that detect objects using electromagnetic waves. In operation, the radar emits electromagnetic waves to detect echoes reflected from objects, so that information such as distance to the objects can be determined. With the development of intelligent equipment, the application of small-sized radars in the civil field is more and more extensive. Millimeter wave (narrow wave) radar systems have been increasingly applied to various vehicles for alerting a distance between the vehicle and an obstacle, assisting a human operator or automatic driving of the vehicle.
The size of the radar assembly is mainly determined by the size of the antenna array, and the detection direction is determined by the radiation direction of the antenna array. Due to the frequency characteristics of the millimeter wave radar system, the millimeter wave radar system can adopt an antenna with a smaller size, so that the millimeter wave radar system has obvious advantages on consumer intelligent equipment. Existing millimeter-wave radar systems typically include planar antenna arrays with antenna elements such as patch antennas, slot antennas, etc. The radiation direction of these antennas is mainly perpendicular to the antenna surface. However, with the miniaturization of smart devices and the demand for multi-module applications, how to highly integrate millimeter wave radar systems into devices remains a great challenge.
Antenna design and arrangement are the determining factors affecting the volume and shape of the final product. Due to the limited installation space, the volume of the antenna products tends to be miniaturized, such as vehicle-mounted radar transceiving systems. Since the area of the antenna is proportional to its gain, and since the chip integration level is increased, the difficulty of antenna arrangement is further increased. Therefore, there is a need for a reasonable antenna design that can provide both small size and high performance.
SUMMERY OF THE UTILITY MODEL
In view of this, the embodiment of the utility model provides a radio frequency front end transceiver and vehicle radar receiving and dispatching system through using the different transmitting antenna of polarization direction and signal transmission direction, can effectively promote the flexibility of putting and overall arrangement of antenna array, and under the prerequisite of ensureing antenna receiving and dispatching signal performance, can also effectively reduce the shared area of whole antenna array, and then reach the purpose that reduces antenna and vehicle radar receiving and dispatching system size.
In an alternative embodiment, the present application provides a radio frequency front end transceiver, which may include:
an antenna array;
the transceiver unit is electrically connected with the antenna array and is used for transceiving electromagnetic wave signals through the antenna array;
wherein the antenna array comprises a transmitting antenna for transmitting the electromagnetic wave signal, an
The signal transmission direction of at least part of the transmitting antennas is different from the polarization direction.
In the embodiment of the radio frequency front end transceiver, by setting the transmitting antenna with the signal transmission direction different from the polarization direction, the flexibility of the design and layout of the whole antenna array can be effectively improved, and meanwhile, the area occupied by the whole antenna array can be reduced, so that the size of the radio frequency front end transceiver is effectively reduced.
In an optional embodiment, the signal transmission direction of at least part of the transmitting antennas is perpendicular to the polarization direction, so that the performance of the antenna array for transmitting and receiving electromagnetic wave signals can be further improved, and the area occupied by the antenna array can be further reduced.
In an optional embodiment, the feeding mode of the transmitting antenna in which the signal transmission direction is different from the polarization direction is intermediate feeding, which can effectively reduce the length of each transmitting antenna feeder, not only can improve the signal-to-noise ratio of the antenna array, but also can improve the power of the electromagnetic wave signal transmitted by the transmitting antenna, or effectively reduce the power consumption of the transmitting antenna when transmitting the electromagnetic wave signal with the same strength.
In an alternative embodiment, the transmitting antenna with the signal transmission direction different from the polarization direction may include:
at least two first transmit antenna units;
a connecting feeder for connecting the first transmitting antenna units in parallel; and
one end of the channel feeder line is connected with the transceiver unit, and the other end of the channel feeder line is connected to the central point of the connecting feeder line, so that each first transmitting antenna unit can be fed through the central point, the length of each feeder line can be further shortened, the directional radiation performance of a transmitting antenna can be improved, and the performance of a receiving and transmitting device can be improved;
wherein a signal transmission direction on the first transmitting antenna unit is different from a polarization direction of the transmitting antenna.
In an alternative embodiment, each of the first transmitting antenna elements is uniformly distributed on the same side of the channel feed line.
In an alternative embodiment, the first transmit antenna unit comprises:
a sub-feeder; and
the radiating units are connected in parallel, and one end part of each radiating unit is connected to the sub-feeder;
and the radiating units are sequentially, alternately and uniformly distributed on two sides of the sub-feeder line.
In an optional embodiment, the antenna array may further include a receiving antenna for receiving an echo of the electromagnetic wave signal transmitted by the transmitting antenna, and a polarization direction of the receiving antenna is the same as a signal transmission direction;
wherein the polarization direction of the receiving antenna is the same as the polarization direction of the transmitting antenna.
In an alternative embodiment, the receiving antenna comprises a plurality of radiating elements connected in series;
wherein, the feeding mode of the receiving antenna is edge feeding.
In an alternative embodiment, the electromagnetic wave signal is a millimeter wave signal.
In an alternative embodiment, the transmit antenna comprises:
a first transmitting sub-antenna, a polarization direction of which is different from a signal transmission direction;
the polarization direction of the second transmitting sub-antenna is the same as the signal transmission direction;
the second transmitting sub-antenna comprises a plurality of radiating elements which are connected in series, and the feeding mode of the receiving antenna is edge feeding.
In an alternative embodiment, the apparatus may further comprise:
a dielectric substrate, the transceiver unit and the antenna array being disposed on a same surface of the dielectric substrate;
wherein the receiving antenna and the first transmitting sub-antenna are distributed on the same side or opposite sides of the transceiver unit.
In an alternative embodiment, the transceiver unit is a radar chip having a transceiver function;
wherein the antenna array is integrated on or in a package layer of the radar chip.
In an optional embodiment, an embodiment of the present application further provides a vehicle-mounted radar transceiving system, which may include:
at least one radio frequency front end transceiver as described in any one of the embodiments herein; and
the processor is connected with the radio frequency front end receiving and sending device;
the processor is used for processing data according to the electromagnetic wave signals transmitted and received by the antenna array.
In the embodiment of the vehicle-mounted radar transceiving system, the radio frequency front end transceiving device with the transmitting antenna with the different signal transmission direction and polarization direction is utilized, so that the arrangement and layout of at least part of the transmitting antenna can be flexibly adjusted, the design of the whole transceiving device is more compact while the performance is ensured, the length of a feed line is effectively reduced, the size of a feed network is reduced, and the space occupied by the vehicle-mounted radar transceiving system is also reduced.
It should be noted that, because the size of the radio frequency front end transceiver in the embodiment of the present application is further reduced, a product including the radio frequency front end transceiver may be applied to more scenes and environments, such as vehicles (e.g., autonomous driving), unmanned aerial vehicles, robots, smart homes, consumer electronics devices, and the like, for example, a vehicle-mounted radar transceiver system including the radio frequency front end transceiver, and the scheme adopted in the embodiment of the present application expands the usage space and market prospects of such products.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent by describing embodiments of the present invention with reference to the following drawings, in which:
FIG. 1 is a schematic diagram of an alternative embodiment of an RF front-end transceiver;
fig. 2 is a schematic structural diagram of a conventional rf front-end transceiver device with transceiver antennas disposed on opposite sides of a transceiver unit;
fig. 3 is a schematic structural diagram of an rf front-end transceiver device in an alternative embodiment, in which the transceiver antennas are disposed on the same side of the transceiver unit;
fig. 4 is a schematic structural diagram of an rf front-end transceiver device with transceiver antennas disposed on opposite sides of a transceiver unit in an alternative embodiment;
fig. 5 is a schematic structural diagram of an rf front-end transceiver device in another alternative embodiment, in which the transceiver antennas are disposed on the same side of the transceiver unit;
fig. 6 is a schematic structural diagram of a vehicle-mounted radar transceiving system in an alternative embodiment.
Detailed Description
The present invention will be described below based on examples, but the present invention is not limited to only these examples. In the following detailed description of the present invention, certain specific details are set forth in detail. It will be apparent to those skilled in the art that the present invention may be practiced without these specific details. Well-known methods, procedures, and procedures have not been described in detail so as not to obscure the present invention. The figures are not necessarily drawn to scale.
In to traditional radio frequency front end device, owing to adopt the antenna that the polarization direction is the same with the signal transmission direction to receive and dispatch the electromagnetic wave signal, and then can make the difficult of arranging of antenna, be difficult to further technical problem such as size that reduces the antenna, in the embodiment of this application, creative adoption polarization direction is different with the signal transmission direction's transmitting antenna, can keep receiving antenna's polarization direction the same with the signal transmission direction simultaneously, and then can effectively promote putting and the flexibility of overall arrangement of antenna array, and under the prerequisite of ensureing antenna receiving and dispatching signal performance, can also effectively reduce the area that whole antenna array shared, and then reach and reduce antenna and vehicle-mounted radar receiving and dispatching system size purpose.
The following description will be made, by way of example, with reference to the accompanying drawings, for a radio frequency front end transceiver in the embodiment of the present application:
fig. 1 is a schematic diagram of an rf front-end transceiver in an alternative embodiment. As shown in fig. 1, the rf front-end transceiver device may include a transceiver unit 120 and an antenna array (not shown) for transceiving electromagnetic wave signals, and the transceiver unit 120 and the antenna array may be integrated on the same surface of the dielectric substrate 110 for transmitting and receiving high-frequency electromagnetic wave information such as millimeter waves, microwaves and centimeter waves for performing operations such as ranging, calibration and communication. The antenna array may include a transmitting antenna for transmitting an electromagnetic wave signal and a receiving antenna 130 for receiving an echo of the electromagnetic wave, the transmitting antenna may include a first transmitting sub-antenna 150 and a second transmitting sub-antenna 140, and the transmitting antenna may be configured to transmit the electromagnetic wave signal, and the receiving antenna 130 may be configured to receive the echo formed after the electromagnetic wave signal is reflected by a target (or an obstacle), and perform the operations of distance measurement, calibration, and communication based on a difference between the echo signal and the transmitted electromagnetic wave signal.
It should be noted that the structure shown in fig. 1 is an antenna structure with four transmission and four reception (i.e. 4T4R), that is, the antenna structure includes four transmitting antennas 130 and four receiving antennas (i.e. two first transmitting sub-antennas 150 and two second transmitting sub-antennas 140), while in other alternative embodiments, the antenna structure may also be an antenna structure with four transmission and two reception, four transmission and three reception, that is, only at least one transmitting antenna and at least one receiving antenna are included, and the same antenna structure may also be used for transceiving electromagnetic wave signals at the same time, and in some special application scenarios, even only an antenna structure including one first transmitting sub-antenna 150 as shown in fig. 1 may be provided, at this time, the first transmitting sub-antenna 150 may also perform operations such as receiving echoes based on a time division multiplexing manner.
Fig. 2 is a schematic structural diagram of a conventional rf front-end transceiver device with transceiver antennas disposed on two opposite sides of a transceiver unit. As shown in fig. 2, in the conventional antenna array, the transmitting antenna and the receiving antenna are all the same structure, and generally all are antenna structures with the same polarization direction and the same signal transmission direction, that is, the transceiver unit 220, the receiving antenna 230, the wide wave transmitting antenna 240 and the narrow wave transmitting antenna 250 are all located on the dielectric substrate 210, each antenna is connected to the transceiver unit 220 through the feeder line 260, and the signal transmission directions of the receiving antenna 230 and the wide wave transmitting antenna 240 are as shown by arrow a, and the signal transmission direction of the narrow wave transmitting antenna 250 is as shown by arrow B, and each antenna is vertically polarized and the signal transmission direction is the same as the antenna polarization direction. Since the receiving antenna 230 and the wide wave transmitting antenna 240 are respectively located on one side of the transceiver unit 220, and the narrow wave transmitting antenna 250 is located on the other side of the transceiver unit 220, that is, the transmitting antennas are located on both sides of the transceiver unit 220, and the signal transmission direction of each transmitting antenna is 180 °, and meanwhile, each transmitting antenna is an antenna structure with the same polarization direction as that of signal transmission, the directional diagram separation defect of the antenna due to the manufacturing error is caused, and the remote detection capability of the antenna is affected. Meanwhile, because the transmitting antenna and the receiving antenna are both of the same antenna structure, the wiring and layout of the antennas are single, and the required area size is large.
Based on the conventional antenna structure shown in fig. 2, the inventor has creatively proposed the structure shown in fig. 1 in the embodiment of the present application, namely the first transmitting sub-antenna 150 is configured as an antenna structure with a signal transmission direction different from the polarization direction, while maintaining the receiving antenna 130 as an antenna structure having the same signal transmission direction and polarization direction, that is, the transmitting antenna and the receiving antenna are different in structure, and a transmitting antenna with a polarization direction different from the signal transmission direction is adopted, for example, a transmitting antenna with a polarization direction perpendicular to the signal transmission direction, i.e., the antenna structures of the second transmitting antenna 140 and the first transmitting antenna 150 shown in fig. 1 are also different, to implement the transmission of different electromagnetic waves, and then effectively promote the flexibility of wiring, the overall arrangement of antenna, can also further reduce the size of the required area of antenna distribution simultaneously to can effectively reduce the size of radio frequency front end transceiver.
In an alternative embodiment, as shown in fig. 1, the transceiver unit 120 may be a radar chip having a transceiver function, the first transmitting sub-antenna 150 may be used for transmitting narrow-wave signals, and the second transmitting sub-antenna 140 may be used for transmitting wide-wave signals; meanwhile, the receiving antenna 130 and the first transmitting sub-antenna 150 may be distributed on two opposite sides of the transceiver unit 120, and the second transmitting sub-antenna 140 may be disposed adjacent to the receiving antenna 130 and on two opposite sides of the transceiver unit 120 from the first transmitting sub-antenna 140. The polarization directions of the first transmitting sub-antenna 150, the second transmitting sub-antenna 140 and the receiving antenna 130 are the same (for example, the direction shown by arrow a in fig. 1), the signal transmission direction of the receiving antenna 130 can be the same as the polarization direction (for example, the direction shown by arrow a in fig. 1), and the signal transmission direction of the first transmitting sub-antenna 150 is perpendicular to the polarization direction (for example, the direction shown by arrow C, D in fig. 1), that is, the signal transmission direction of the receiving antenna 130 is different from the signal transmission direction of the first transmitting sub-antenna 150, for example, the signal transmission directions of the two are perpendicular to each other as shown in fig. 1.
As shown in fig. 2, the narrow-wave transmitting antenna 250 includes a plurality of sub-antenna units 231 connected in parallel, and each of the receiving antenna 230 and the wide-wave transmitting antenna 240 includes one sub-antenna unit 231, but each sub-antenna unit 231 is formed by connecting a plurality of radiating units 270 in series, and the narrow-wave transmitting antenna 250 is also an edge feeder, so that the occupied area of the whole antenna is large, and the feeder 260 connected between the narrow-wave transmitting antenna 250 and the transceiver unit 220 is also long, and meanwhile, the equal-length windings of the feeder 260 connected to the transceiver unit 220 are also long, which may increase loss, and if the feeder 260 in the form of a microstrip line or a coplanar waveguide is used, the isolation and the directional pattern may be affected.
In an alternative embodiment, in view of the technical problem of the structure shown in fig. 2, the inventor of the present application has creatively proposed to use the parallel radiation elements to form the sub-antenna elements of the transmitting antenna, and simultaneously, to electrically connect the transmitting antenna and the transceiver unit by means of intermediate (or central) feeding. As shown in fig. 1, the transceiver unit 120 may include a plurality of receiving channels and a plurality of transmitting channels, the receiving antenna 130 may include a plurality of receiving sub-antennas 131, and each receiving sub-antenna 131 corresponds to a plurality of receiving channels one to one, and each receiving sub-antenna 131 includes a receiving sub-antenna unit formed by a plurality of radiating elements 170 connected in series, that is, each receiving sub-antenna unit is connected to one receiving channel of the transceiver unit 120 through a channel feeder 162, so as to form an edge-powered receiving sub-antenna 131. Similarly, each second transmitting sub-antenna 140 is also corresponding to a transmitting channel one to one, and each second transmitting sub-antenna 140 includes a second receiving sub-antenna unit 141 formed by a plurality of radiating units 170 connected in series, that is, each second receiving sub-antenna unit 141 is connected to a transmitting channel of the transceiver unit 120 through a channel feeder 161, thereby forming an edge-powered second transmitting sub-antenna 140.
Meanwhile, as shown in fig. 1, each first transmitting sub-antenna 150 may include a first transmitting antenna unit 151 (or 152), and each first transmitting antenna unit 151 (or 152) may be correspondingly connected to a transmitting channel through a channel feeder 162. Each first transmitting antenna unit 151 (or 152) may include a plurality of first receiving sub-antenna units 180 connected in parallel by a connecting feeder 1621, each first transmitting sub-antenna unit 180 may include a plurality of radiating units 170 connected in parallel by a sub-feeder 1622, and each radiating unit 170 is sequentially, alternately and uniformly distributed on two sides of the sub-feeder 1622. Similarly, the first transmitting antenna units 151 (or 152) and their corresponding transmitting channels are connected by the channel feeding line 162, and each of the first transmitting antenna units 151 is uniformly distributed on the same side of its channel feeding line 162, thereby forming the first transmitting antenna 150 with a polarization direction perpendicular to the signal transmission direction.
Specifically, as shown in fig. 1, taking the transceiver unit 120 including 4 receiving channels and 4 transmitting channels as an example, the receiving antenna 130 includes 4 receiving sub-antennas 131, which are respectively in one-to-one correspondence with the 4 receiving channels, and the signal transmission direction of the receiving antenna 130 is shown by an arrow a; each second receiving sub-antenna element 141 of the second transmitting sub-antenna 140 may include 6 radiating elements 170 connected in series, and the second receiving sub-antenna element 141 is electrically connected to the receiving channel of the transceiver unit 120 through the feeder line 161. Meanwhile, the two first transmitting sub-antennas 150 may respectively include a first transmitting antenna unit 151 and a first transmitting antenna unit 152, and the first transmitting antenna unit 151 and the first transmitting antenna unit 152 are arranged in bilateral symmetry, a signal transmission direction of the first transmitting antenna unit 151 is shown as an arrow C, and a signal transmission direction of the first transmitting antenna unit 152 is shown as an arrow D. In addition, the first transmitting antenna unit 151 and the first transmitting antenna unit 152 may correspond to one transmitting channel, respectively, and are connected to the transceiver unit 120 through the channel feeder 162, respectively.
As shown in fig. 1, in an alternative embodiment, taking the first transmitting antenna unit 151 as an example for detailed description, the first transmitting antenna unit 151 may include six mutually parallel sub-feeding lines 1622, that is, each sub-feeding line 1622 may extend mutually parallel in a direction indicated by an arrow C, the six sub-feeding lines 1622 are connected in parallel by one unit feeding line 1621, and each sub-feeding line 1622 may have a plurality of unit nodes 1625 uniformly distributed thereon; for example, 4 evenly distributed cell nodes 1625 may be disposed on a single sub-feed 1622 in fig. 1, and one corresponding radiating element 170 may be disposed at each cell node 1625, i.e., the end of each radiating element 170 is electrically connected to the sub-feed 1622 at the cell node 1625.
Further, as shown in fig. 1, the 4 radiating elements 170 may be alternately disposed on opposite sides of the sub-feeding line 1622 in sequence. In addition, the connecting feed 1621 is connected at its center point 1623 to one of the transmit channels of the transceiver unit 120 by the channel feed 162, i.e. the direction of the intermediate feed is used to electrically connect the transceiver unit 120 with the first transmit antenna unit. The connecting feeder 1621 is further provided with sub-nodes 1624 uniformly distributed, the sub-nodes 1624 may be symmetrically distributed based on a central point 1623 of the connecting feeder 1621, and one end of each sub-feeder 1622 is electrically connected to the sub-node 1624 of the connecting feeder 1621, so that parallel connection of a plurality of sub-feeders 1622 is realized through the connecting feeder 1621 to form a first transmitting antenna unit 151 with a parallel structure, and the radiating unit string 180 formed by each sub-feeder 1622 in the first transmitting antenna unit 151 (i.e., the radiating unit string 180 is formed by a single sub-feeder and the radiating unit 170 thereon) is connected in parallel to the same transmitting channel through the channel feeder 162 by the connecting feeder 1621.
In the embodiment of the present application, as shown in fig. 1, since the feeding manner of the first transmitting sub-antenna 150 is intermediate feeding, the length of each transmitting antenna feeder (e.g., the length of equal-length windings on the channel feeder close to the transceiver unit 120) can be effectively reduced, which not only can improve the signal-to-noise ratio of the antenna array, but also can improve the power of the electromagnetic wave signal transmitted by the transmitting antenna, or effectively reduce the power consumption of the transmitting antenna when transmitting the electromagnetic wave signal with the same strength.
It should be noted that the specific arrangement numbers of the receiving channels, the transmitting channels, and the receiving antennas and the transmitting antenna arrays described in the embodiments of the present application are all examples, and the number thereof may be adjusted according to actual requirements. The radiation unit 170 may be any one of a vertical endfire antenna, a planar endfire antenna, a printed dipole, a Vivaladi antenna, a slot antenna, and a horn antenna. Similarly, the polarization directions of the receiving antenna 130, the first transmitting sub-antenna 150 and the second transmitting sub-antenna 140 may be at least one selected from vertical polarization and horizontal polarization, and the first transmitting sub-antenna 150 is disposed in a direction matching the polarization direction.
Fig. 3 is a schematic structural diagram of an rf front-end transceiver device in an alternative embodiment, in which the transceiver antennas are disposed on the same side of the transceiver unit. As shown in fig. 3, the rf front-end transceiver device may include a dielectric substrate 310, a transceiver unit 320, and an antenna array for transceiving electromagnetic wave signals, where the transceiver unit 320 and the antenna array may be integrated on the dielectric substrate 310 for transmitting and receiving high-frequency electromagnetic wave information such as millimeter waves, microwaves and centimeter waves for performing operations such as ranging, calibration and communication. The antenna array may include a transmitting antenna for transmitting an electromagnetic wave signal and a receiving antenna 330 for receiving an echo of the electromagnetic wave, the transmitting antenna may include a first transmitting sub-antenna 350 and a second transmitting sub-antenna 340, and the like, that is, the transmitting antenna may be used for transmitting the electromagnetic wave signal, and the receiving antenna 330 may be used for receiving the echo formed after the electromagnetic wave signal is reflected by a target (or an obstacle), and performing the operations of distance measurement, calibration, communication, and the like based on a difference between the echo signal and the transmitted electromagnetic wave signal.
Each antenna includes a plurality of radiating elements connected in series, as shown in fig. 3, the receiving antenna 330 includes a plurality of sub-antenna elements 331 connected in parallel; the second transmitting sub-antenna 340 includes a plurality of sub-antenna units 341 connected in parallel, each of which is formed by connecting a plurality of radiating elements in series, and the first transmitting sub-antenna 350 includes a first transmitting antenna unit 351 and a first transmitting antenna unit 352.
As shown in fig. 3, the transceiver unit 320 may be a radar chip with transceiver function, the first transmitting sub-antenna 350 may be used for transmitting narrow-wave signals, and the second transmitting sub-antenna 340 may be used for transmitting wide-wave signals; meanwhile, the receiving antenna 330, the first transmitting sub-antenna 350, and the second transmitting sub-antenna 340 are all located on the same side of the transceiver unit 320. The polarization directions of the first transmitting sub-antenna 350, the second transmitting sub-antenna 340 and the receiving antenna 330 are the same (for example, the direction shown by arrow a in fig. 3), the signal transmission direction of the receiving antenna 330 may be the same as the polarization direction (for example, the direction shown by arrow a in fig. 3), and the signal transmission direction of the first transmitting sub-antenna 350 is perpendicular to the polarization direction (for example, the direction shown by arrow C, D in fig. 3), that is, the signal transmission direction of the receiving antenna 330 is different from the signal transmission direction of the first transmitting sub-antenna 350, for example, the signal transmission directions of the two transmitting sub-antennas are perpendicular to each other as shown in fig. 3.
The specific structure of the first transmitting sub-antenna 350 in fig. 3 is similar to that in fig. 1, and is not repeated herein, and compared to fig. 1, in fig. 3, the first transmitting sub-antenna 350, the receiving antenna 330, and the second transmitting sub-antenna 340 are all disposed on the same side of the transceiver unit 320, and the signal transmission direction of the first transmitting sub-antenna 350 is perpendicular to the polarization direction, and by disposing transmitting antennas with different signal transmission directions and polarization directions, the flexibility of the design and layout of the whole antenna array can be effectively improved, the reduction of antenna performance due to manufacturing errors is reduced, the area occupied by the whole antenna array is reduced, and further the size of the rf front-end transceiver is effectively reduced.
In an alternative embodiment, the transceiver unit is, for example, a radar chip with transceiver function, and the antenna array may be integrated on or in a package layer of the radar chip.
In an alternative embodiment, as shown in fig. 4, only the receiving antenna 430 and the first transmitting sub-antenna 450 are used to cooperate, and the receiving antenna 430 and the first transmitting sub-antenna 450 are symmetrically disposed on the upper and lower sides of the transceiver unit 420, respectively, although the receiving antenna 430 and the first transmitting sub-antenna 450 may also be disposed on the left and right sides of the transceiver unit 420, respectively. The first transmitting sub-antenna 450 has the same structure and layout as the first transmitting sub-antenna 150 shown in fig. 1, which are not described herein again, and is electrically connected to the transceiver unit 420 by using a middle feeding method, and the receiving antenna 430 is electrically connected to the transceiver unit 420 by using an edge feeding method. In this embodiment, the second transmitting sub-antenna 440 is omitted, so that the transverse (longitudinal) dimension of the transceiver device can be made smaller to meet the size requirement of a specific use scenario.
Similarly, as another alternative embodiment, as shown in fig. 5, it also employs a combination of using only the first transmitting sub-antenna 550 in cooperation with the receiving antenna 230. The receiving antenna 530 and the first transmitting sub-antenna 550 are both disposed on the same side of the transceiver unit 520, and the first transmitting sub-antenna 550 is disposed on the right side of the receiving antenna 530 in parallel with the receiving antenna 530. Specifically, the receiving antenna 530 is located right above the transceiver unit 520, and the first transmitting sub-antenna 550 is located at the upper right of the transceiver unit 520. The first transmitting sub-antenna 550 is internally arranged in the same manner as the first embodiment shown in fig. 1, and will not be described herein again.
It should be noted that, directions such as "up, down, left, right" and the like in the embodiments of the present application are all based on the front view of the drawings, and it should be understood by those skilled in the art that, in practical applications, the distribution of the antenna array may be adaptively adjusted according to actual requirements, and the distribution mode after the adjustment should also be included in the technical content of the present application.
Fig. 6 is a schematic structural diagram of a vehicle-mounted radar transceiving system in an alternative embodiment. As shown in fig. 6, the vehicle-mounted radar transmission/reception system includes: a radio frequency front end transceiver 61 and a processor 62 connected to the radio frequency front end transceiver 61, wherein the processor is configured to perform data processing according to the electromagnetic wave signals transmitted and received by the antenna array (the radio frequency front end transceiver 61). Of course, the vehicle-mounted radar transceiver system may also include a plurality of rf front-end transceivers 61 respectively connected to the processor 62, and the transceiver units in the rf front-end transceivers 61 may be independent transceiver chips or may be integrated with the processor 62 to form a system-on-chip.
In the above embodiment, the size of the antenna is further reduced, so that the transceiver can be applied to more scenes and environments such as vehicles, unmanned planes, robots, smart homes and the like, and the use space and market prospect of the products are expanded.
To sum up, the utility model discloses radio frequency front end receiving and dispatching device and vehicle radar receiving and dispatching system through utilizing the radio frequency front end receiving and dispatching device that has the different transmitting antenna of signal transmission direction and polarization direction, not only can make putting and the overall arrangement of at least partial transmitting antenna can adjust in a flexible way, and when guaranteeing the performance, make whole receiving and dispatching device's design compacter, effectively reduce feeder length, reduced the size of feed network, also reduced the shared space of vehicle radar receiving and dispatching system.
It should be noted that, because the size of the radio frequency front end transceiver in the embodiment of the present application is further reduced, a product including the radio frequency front end transceiver may be applied to more scenes and environments, such as vehicles (e.g., autonomous driving), unmanned aerial vehicles, robots, smart homes, consumer electronics devices, and the like, for example, a vehicle-mounted radar transceiver system including the radio frequency front end transceiver, and the scheme adopted in the embodiment of the present application expands the usage space and market prospects of such products.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (10)
1. A radio frequency front end transceiver, the apparatus comprising:
an antenna array;
the transceiver unit is electrically connected with the antenna array and is used for transceiving electromagnetic wave signals through the antenna array;
wherein the antenna array comprises a transmitting antenna for transmitting the electromagnetic wave signal, an
The signal transmission direction of at least part of the transmitting antennas is different from the polarization direction.
2. The apparatus of claim 1, wherein the signal transmission direction of at least some of the transmitting antennas is perpendicular to the polarization direction; and/or
The feeding mode of the transmitting antenna with the signal transmission direction different from the polarization direction is middle feeding.
3. The apparatus of claim 2, wherein the transmitting antenna with signal transmission direction different from polarization direction comprises:
at least two first transmit antenna units;
a connecting feeder for connecting the first transmitting antenna units in parallel; and
a channel feeder, one end of which is connected with the transceiver unit and the other end of which is connected to the center point of the connection feeder;
wherein a signal transmission direction on the first transmitting antenna unit is different from a polarization direction of the transmitting antenna.
4. A device according to claim 3, wherein each of the first transmit antenna elements is evenly distributed on the same side of the channel feed; and/or
The first transmit antenna unit includes:
a sub-feeder; and
the radiating units are connected in parallel, and one end part of each radiating unit is connected to the sub-feeder;
and the radiating units are sequentially, alternately and uniformly distributed on two sides of the sub-feeder line.
5. The apparatus of claim 1, wherein the antenna array further comprises a receiving antenna for receiving an echo of the electromagnetic wave signal from the transmitting antenna, and the polarization direction of the receiving antenna is the same as the signal transmission direction;
wherein the polarization direction of the receiving antenna is the same as the polarization direction of the transmitting antenna.
6. The apparatus of claim 5, wherein the receive antenna comprises a plurality of radiating elements connected in series;
wherein, the feeding mode of the receiving antenna is edge feeding.
7. The apparatus according to claim 1, wherein the electromagnetic wave signal is a millimeter wave signal; and/or
The transceiver unit is a radar chip with transceiver function;
wherein the antenna array is integrated on or in a package layer of the radar chip.
8. The apparatus of claim 5, wherein the transmit antenna comprises:
a first transmitting sub-antenna, a polarization direction of which is different from a signal transmission direction;
the polarization direction of the second transmitting sub-antenna is the same as the signal transmission direction;
the second transmitting sub-antenna comprises a plurality of radiating elements which are connected in series, and the feeding mode of the receiving antenna is edge feeding.
9. The apparatus of claim 8, further comprising:
a dielectric substrate, the transceiver unit and the antenna array being disposed on a same surface of the dielectric substrate;
wherein the receiving antenna and the first transmitting sub-antenna are distributed on the same side or opposite sides of the transceiver unit.
10. A vehicle-mounted radar transmitting and receiving system, comprising:
at least one radio frequency front end transceiver device according to any one of claims 1-9; and
the processor is connected with the radio frequency front end receiving and sending device;
the processor is used for processing data according to the electromagnetic wave signals transmitted and received by the antenna array.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920647409.0U CN210742489U (en) | 2019-05-07 | 2019-05-07 | Radio frequency front end receiving and transmitting device and vehicle-mounted radar receiving and transmitting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920647409.0U CN210742489U (en) | 2019-05-07 | 2019-05-07 | Radio frequency front end receiving and transmitting device and vehicle-mounted radar receiving and transmitting system |
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| Publication Number | Publication Date |
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| CN210742489U true CN210742489U (en) | 2020-06-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920647409.0U Withdrawn - After Issue CN210742489U (en) | 2019-05-07 | 2019-05-07 | Radio frequency front end receiving and transmitting device and vehicle-mounted radar receiving and transmitting system |
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| CN (1) | CN210742489U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110174649A (en) * | 2019-05-07 | 2019-08-27 | 加特兰微电子科技(上海)有限公司 | Radio-frequency front-end transceiver, trailer-mounted radar receive-transmit system |
-
2019
- 2019-05-07 CN CN201920647409.0U patent/CN210742489U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110174649A (en) * | 2019-05-07 | 2019-08-27 | 加特兰微电子科技(上海)有限公司 | Radio-frequency front-end transceiver, trailer-mounted radar receive-transmit system |
| CN110174649B (en) * | 2019-05-07 | 2024-07-19 | 加特兰微电子科技(上海)有限公司 | Radio frequency front-end transceiver and vehicle-mounted radar transceiver system |
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