TW201603390A - Antenna device with high isolation - Google Patents

Abstract

An antenna device includes a transmitter antenna, a receiver antenna, a reflector and a radome. The transmitter antenna is used to radiate polarized waves towards a front side of the transmitter antenna. The receiver antenna is used to receive radiation waves. The reflector is disposed in front of the transmitter antenna and the receiver antenna, and used to reflect the waves radiated from the transmitter antenna. The reflector includes a frame and at least a reflection bar. The frame includes two horizontal bars and two vertical bars. Each reflection bar is connected to the two horizontal bars and is substantially parallel to the two vertical bars. The radome provides a containing space for containing the transmitter antenna, the receiver antenna and the reflector.

Description

Antenna device with high isolation

The present invention relates to an antenna device, and more particularly to an antenna device that can reflect radiation waves emitted by a transmitting antenna.

A prior art antenna device has a transmitter antenna and a receiver antenna. The transmitting antenna is used to emit radiation waves (which may be radiated waves of different frequencies such as HF, VHF or UHF depending on the application) to the outside of the antenna device, and the receiving antenna is used to receive the radiated waves from the outside of the antenna device. A typical antenna device having both a transmitting antenna and a receiving antenna may be, for example, a radar device that first transmits a radiation wave with a transmitting antenna and then receives a radiation wave reflected by an external object with a receiving antenna for subsequent analysis. In order to protect the transmitting antenna, the receiving antenna and related equipment, it is practical to accommodate the transmitting antenna and the receiving antenna with a radome to prevent it from being damaged by exposure to sunlight or moisture. However, as shown in the schematic diagram of the antenna device 100 of the prior art of FIG. 1, the reflected wave Ra' generated by the radiation wave Ra emitted by the transmitting antenna ANT1 contacting the inner wall of the radome 110 is a radiation wave that the antenna device does not want to receive. However, it is received by the receiving antenna ANT2, and the receiving antenna ANT2 is prevented from correctly receiving the radiated wave Rb from the outside of the antenna device 100. Therefore, there is a need in the art for a solution to eliminate the effect of the reflected wave Ra' generated at the inner wall of the radome 110 at the receiving antenna ANT2.

An antenna device includes a transmitting antenna, a receiving antenna, a first reflecting member, a second reflecting member and a radome. The transmitting antenna is configured to emit a radiation wave having a polarization direction toward the front of the transmitting antenna, and the receiving antenna is configured to receive the radiation wave. The first A reflector is disposed in front of the transmitting antenna and the receiving antenna to reflect the radiation wave emitted by the transmitting antenna. The first reflective member includes a first frame, including two first crossbars, substantially parallel to the polarization direction, and two first longitudinal rods, substantially perpendicular to the polarization direction; and at least one first reflective grid A rod, each of the first reflective grids being coupled to the two first rails and substantially perpendicular to the polarization direction. The second reflector is disposed in front of the transmitting antenna and the receiving antenna to reflect the radiation wave emitted by the transmitting antenna. The second reflective member includes a second frame including two second crossbars substantially parallel to the polarization direction, and two second longitudinal bars substantially perpendicular to the polarization direction; and at least one second reflective grating A rod, each of the second reflective grids being coupled to the two second rails and substantially perpendicular to the polarization direction. The radome provides an accommodating space for accommodating the transmitting antenna, the receiving antenna, the first reflecting member and the second reflecting member.

Another embodiment of the present invention discloses an antenna device including a transmitting antenna, a receiving antenna, a reflecting member and a radome. The transmitting antenna is configured to emit a radiation wave having a polarization direction toward the front of the transmitting antenna, and the receiving antenna is configured to receive the radiation wave. The reflector is disposed in front of the transmitting antenna and the receiving antenna to reflect the radiation wave emitted by the transmitting antenna. The reflector comprises a frame comprising two crossbars substantially parallel to the polarization direction, and two longitudinal rods substantially perpendicular to the polarization direction; and at least one reflection grid rod, each of the reflection grid bars being connected to the Two crossbars and substantially perpendicular to the polarization direction. The radome provides an accommodating space for accommodating the transmitting antenna, the receiving antenna and the reflecting member.

Another embodiment of the present invention discloses an antenna device including a transmitting antenna, a receiving antenna, a first set of reflective grid bars and a radome. The transmitting antenna is configured to emit a radiation wave having a polarization direction toward the front of the transmitting antenna, and the receiving antenna is configured to receive the radiation wave. The first set of reflective grids includes a plurality of reflective grids disposed in front of the transmitting antenna and the receiving antenna for reflecting radiation waves emitted by the transmitting antenna, each of the reflective grids being substantially perpendicular to the polarization direction . The radome provides an accommodating space for accommodating the transmitting antenna, the receiving antenna and the first set of reflective grating bars.

By using the antenna device disclosed in the embodiment of the present invention, the interference caused by the radiation wave reflected from the inner wall of the radome can be greatly reduced to help the receiving antenna correctly receive the radiant energy outside the antenna device.

100, 200, 500, 600‧‧‧ antenna devices

110, 220‧‧‧ radome

290‧‧‧Fixed unit

ANT1, ANT _Tx ‧‧‧ transmit antenna

ANT2, ANT _Rx ‧‧‧ receiving antenna

Ra, Ra', Rb, R0, R01, R1, R11, R2, R3‧‧‧ radiation waves

230, 530, 930‧‧‧ Backplane

210‧‧‧reflector

250, 720, 1650‧‧‧ connectors

240, 1610‧‧ ‧ slide rails

1620‧‧‧Auxiliary slide rails

D1, D2‧‧‧ direction

2101‧‧‧Frame

2102, 7102‧‧‧reflecting grid

21011‧‧‧cross bar

21012‧‧‧longitudinal rod

S1‧‧‧Antenna groove

5401, 6401‧‧‧ first slide rail

5402, 6402‧‧‧ second slide

5101, 6101‧‧‧ first reflector

5102, 6102‧‧‧ second reflector

5201‧‧‧First connector

5202‧‧‧Second connector

710, 8101, 8102, 8103‧‧‧Reflecting grid

81011, 81021, 81031‧‧‧ linkage

819‧‧‧ gap

k‧‧‧Dislocation distance

RB _Rx , RB _Tx ‧‧‧Antenna partition

160a, 160b, 160c‧‧‧ position

Figure 1 is a schematic illustration of a prior art antenna assembly.

Fig. 2 is a schematic view showing an antenna device according to an embodiment of the present invention.

Figure 3 is a schematic view of a reflecting member of an embodiment of the present invention.

Figure 4 is a partial schematic view of the antenna device of Figure 2.

Figure 5 is a schematic view of another perspective of the antenna device of Figure 2.

Figure 6 is a partial schematic view of an antenna device according to another embodiment of the present invention.

Figure 7 is a partial schematic view of the antenna device of the embodiment of Figure 6.

Figure 8 is a partial schematic view of the antenna device of the embodiment of Figure 6.

Figure 9 is a partial schematic view of an antenna device according to another embodiment of the present invention.

Figure 10 is a schematic illustration of a reflective grid set of another embodiment of the present invention.

Figure 11 is a schematic view of the reflection grid set of Figure 10.

Fig. 12 is a schematic view showing a reflection grid group of another embodiment of the present invention.

Figure 13 is a schematic view showing a reflection grid group of another embodiment of the present invention.

Figure 14 is a schematic illustration of a reflective grid set of another embodiment of the present invention.

Figure 15 is a schematic diagram showing a misalignment between a transmitting antenna and a receiving antenna in an embodiment of the present invention.

Figure 16 is a schematic view of a slide rail and at least one auxiliary slide rail in the embodiment of the present invention.

FIG. 2 is a schematic diagram of an antenna device 200 according to an embodiment of the present invention. The antenna device 200 includes a transmitting antenna ANT _Tx , a receiving antenna ANT _Rx , a reflector 210 and a radome 220. The transmitting antenna ANT _{Tx is} used to emit a radiation wave R0 having a polarization direction of the direction D1 toward the front of the transmitting antenna ANT _Tx . The receiving antenna ANT _{Rx is} used to receive radiation waves. The reflector 210 is disposed before the transmitting antenna ANT _Tx and the receiving antenna ANT _Rx to reflect a small portion of the radiated wave R0 emitted by the transmitting antenna ANT _Tx to generate the reflected radiated wave R01; the radiating wave emitted by the transmitting antenna ANT _Tx Most of R0 can be transmitted through the reflector 210 to produce a transmitted radiation wave R1. The radome 220 is configured to provide an accommodating space for accommodating the transmitting antenna ANT _Tx , the receiving antenna ANT _{Rx ,} and the reflecting member 210 . At the same time, the radome 220 also reflects a small portion of the radiation wave R1 to generate a reflected radiation wave R11, and most of the radiation wave R1 can be transmitted through the radome 220 to generate a transmitted radiation wave R2.

Figure 3 is a schematic illustration of a reflector 210 in accordance with an embodiment of the present invention. The reflector 210 includes a frame 2101. The frame 2101 includes two crossbars 21011 that are substantially parallel to the polarization direction of the radiated wave R0 (direction D1) and the two longitudinal bars 21012, substantially perpendicular to the direction D1. The reflector 210 also includes at least one reflective grid 2102, each reflective grid 2102 being coupled to the two rails 21011 and substantially perpendicular to the direction D1.

Figure 4 is a partial schematic view of an antenna device 200 in accordance with an embodiment of the present invention. The antenna device 200 includes a backplane 230. The transmitting antenna ANT _Tx and the receiving antenna ANT _Rx are fixed on the backplane 230. The backplane 230 has a sliding rail 240. The orbital direction of the sliding rail 240 is substantially parallel to the transmitting antenna ANT _Tx. The polarization direction of the electromagnetic wave R0, that is, substantially parallel to the direction D1. The antenna device 200 further includes a connecting member 250, the first end of which is fixed to the reflecting member 210, and the second end is disposed on the sliding rail 240 so as to be slidable along the sliding rail 240. Therefore, the reflecting member 210 can slide in the direction D1 by the connecting member 250 and the slide rail 240. The connecting member 250 may further comprise an adjustable length telescopic unit (for example, a telescopic unit composed of a solid shaft and a hollow sleeve shaft; or a first sub-connector having a plurality of rows of perforations and a plurality of row screws) The second sub-connector of the hole is composed of a telescopic unit which can be adjusted in length after being adjusted by a screw, and is used for telescopically adjusting the length of the connecting member 250 to adjust the reflecting member 210 and the transmitting antenna ANT _Tx / receiving antenna The distance between the ANT _Rx , by which the phase of the radiation wave R01 shown in Fig. 2 can be adjusted to improve the isolation between the antennas and to better the reception effect of the receiving antenna ANT _Rx .

In the antenna device 200 shown in FIGS. 2 to 4, the user can move the reflector 210 on the slide rail 240 in the direction D1 so that the radiation wave R0 emitted from the transmitting antenna ANT _Tx is reflected by the reflector 210. The wave R01 is compared with the radiation wave R11 generated by the radiation wave R1 reflected by the radome 220, and is adjusted toward the ideal state of the same amplitude and opposite phase at the receiving antenna ANT _Rx , and the radiation wave R01 and the radiation wave R11 are mutually offset as much as possible. pin. As shown in Fig. 2, when the receiving antenna ANT _Rx receives the radiated wave R3 from the outside of the antenna device 200, it is less likely to interfere with the radiated wave R11.

As shown in FIG. 4, the transmitting antenna ANT _Tx and the receiving antenna ANT _Rx have a plurality of antenna slots S1. In the embodiment shown in FIG. 3, the plurality of antenna slots S1 are perpendicular to the direction D1 and are added. The respective tilt angles are engraved on the transmitting antenna ANT _Tx and the receiving antenna ANT _Rx such that the radiating wave R1 emitted by the transmitting antenna ANT _Tx has a polarization direction of the direction D1, and the receiving antenna ANT _Rx can be used to receive the polarization direction. Radiation waves parallel to direction D1. In the reflection member 210 disclosed in FIGS. 2 to 3, since the reflection grating rod 2102 is perpendicular to the polarization direction (direction D1) of the radiation wave R0 shown in FIG. 2, the radiation wave R0 shown in FIG. 2 can be large. partial penetration reflective member 210, and therefore the area of the reflecting member 210 may be allowed to cover the opening range of the transmitting antenna _Tx ANT and does not affect the efficiency of transmit antenna _Tx ANT shape of the radiation field. The crossbar 21011 and the vertical rod 21012 may be, but not limited to, rectangular, such that the gap formed by the crossbar 21011 and the longitudinal rod 21012 is, but not limited to, an elongated rectangular gap, for example, a long side parallel An elongated rectangular gap in the direction D2 and having a short side parallel to the direction D1, wherein the direction D2 is perpendicular to the direction of the direction D1. In the plurality of antenna slots S1 of the transmitting antenna ANT _Tx and the receiving antenna ANT _Rx , the tilt angle of each antenna slot S1 is an amplitude intensity of a radiation wave transmitted or received corresponding to the position of the antenna slot S1. In the embodiment of the present invention, the polarization direction of the emitted radiation wave R0 corresponds to the direction perpendicular to the antenna slot S1 of the transmitting antenna ANT _Tx and is the direction D1. Further, according to the embodiment of FIG. 4, since the antenna notch S1 of the receiving antenna ANT _Rx is also substantially perpendicular to the direction D1, the receiving radiation wave received by the antenna ANT _Rx (such as the radiated wave R3 shown in FIG. 2) The polarization direction is also set to direction D1.

5 is a schematic view of another view of the antenna device 200, wherein the radome 220 is transparent, and the visible antenna ANT _Tx , the receiving antenna ANT _Rx and the reflective member 210 are housed in the radome 220, and the fixing unit is shown. The 290 is used to mount the fixed radome 220.

6 to 8 are partial schematic views of an antenna device 500 according to another embodiment of the present invention. The antenna device 500 has two reflecting members compared to the antenna device 200. Therefore, the antenna device 500 has a first reflecting member 5101 and a second reflecting member 5102, wherein the first reflecting member 5101 and the second reflecting member 5102 comprise a frame, Since the vertical rod and the cross rod are similar to the reflecting member 210 shown in Fig. 3, they will not be described again. The antenna device 500, to fix the transmitting antenna may be disposed on a first transmit antenna and the second slide rail 5401 between 5402 and receive antenna ANT _Tx ANT _Rx and on the back plate 530 ANT _Tx ANT _Rx of the receiving antenna. The first end of the first connecting member 5201 is fixed to the first reflecting member 5101, and the second end is disposed on the first sliding rail 5401 so as to be slidable along the first sliding rail 5401. The first end of the second connecting member 5202 is fixed to the second reflecting member 5102, and the second end is disposed on the second sliding rail 5402 so as to be slidable along the second sliding rail 5402. Thereby, the first reflecting member 5101 and the second reflecting member 5102 can each be slidably adjusted in the direction D1. In this embodiment, the length of the first connecting member 5201 can be, for example, greater than the length of the second connecting member 5202 (as shown in FIG. 6), so that the first reflecting member 5101 is spaced from the backing plate by the second reflecting member 5102. 530 farther. Therefore, when the first reflecting member 5101 and the second reflecting member 5102 are adjusted in sliding, their positions may completely overlap, partially overlap, or not overlap at all (as shown in FIGS. 7 to 8). Referring to FIG. 2 and FIG. 6 to FIG. 8 , the amount of reflection of the radiation wave R01 can be adjusted by the degree of overlap between the first reflection member 5101 and the second reflection member 5102, and the user can adjust the optimum radiation wave R01. Reduce the interference caused by the radiated wave R11.

The examples of FIGS. 6 to 8 are embodiments in which the first reflecting member 5101 and the second reflecting member 5102 can be respectively slidably adjusted. However, according to another embodiment of the present invention, the first connecting member 5201 having a longer length can also be used. The second second connecting member 5202 is disposed on the same sliding rail so as to be slidable along the sliding rail, so that the first connecting member 5201 and the second connecting member 5202 are respectively connected to the first reflecting member 5101 and the second reflecting member. The 5102 can be individually slidably adjusted so as to be completely overlapping, partially overlapping, or not overlapping at all. As shown in the partial schematic diagram of the antenna device 600 of the embodiment of the present invention, the first sliding rail 6401 can be mounted on the backplane 630 above the receiving antenna ANT _Rx (for example, the first sliding rail 6401 is mounted on the back rail 630). the backplane 630, or 6401 first rail attached to the receiving antenna ANT _Rx separator RB _Rx antenna, wherein the antenna ANT _Rx of the receiving antenna based separator RB _Rx antenna of FIG. 6 as the first separator shown RB _Rx) And inserting the crossbar on the upper side of the frame of the first reflecting member 6101 into the first sliding rail 6401 to make the first reflecting member 6101 slidably adjustable; and mounting the second sliding rail 6402 under the transmitting antenna ANT _Tx (for example, the second rail 6402 mounted on a back plate 630, or the second slide rail 6402 is attached to the transmitting antenna ANT _Tx separator RB _Tx antennas, wherein the transmit antenna ANT _Tx antennas based separator RB _Tx antenna as in FIG. 6 of the separator The RB _{Tx is} shown), and the crossbar on the lower side of the frame of the second reflecting member 6102 is embedded in the second sliding rail 6402 to slidably adjust the second reflecting member 6102 to slidably adjust the first reflecting member 6101 and the second reflecting member. The 6102 is made to overlap completely, partially overlap, or not overlap at all. In the embodiment of FIG. 9 , the first reflecting member and the second reflecting member are respectively mounted on a sliding rail. The user can also install a sliding rail on each of the upper and lower reflecting members and the upper and lower sides of the reflecting member. The slide rails are all embedded for sliding adjustment, but the slide rails are staggered back and forth so that the plurality of reflectors are overlapped. According to the embodiment of the present invention, the front-rear distance between the first reflecting member and the second reflecting member as shown in FIGS. 6 to 9 can be optimized by the developer through software simulation and experimental measurement.

The reflector 210 for reflecting the radiation wave R0 shown in FIG. 2, the first reflector 5101, the second reflector 5102, the first reflector 6101 and the second reflector 6102 are framed and perpendicular to the radiation wave. The polarization direction of R0 (direction D1) is composed of at least one reflection grid. According to an embodiment of the invention, the reflective member may also be composed of only a plurality of reflective grating bars perpendicular to the polarization direction (direction D1) of the radiation wave R0. 10 to 11 are schematic views of a reflection grid group 710 for reflecting the radiation wave R0 as shown in Fig. 2 to generate a radiation wave R01 in another embodiment of the present invention. Each of the reflection grid sets 710 includes a plurality of reflection grids 7102. Since the direction is perpendicular to the polarization direction of the radiation wave R0 (direction D1), most of the radiation waves R0 emitted by the transmission antenna ANT _Tx can pass through the reflection grid. In the rod group 710, only a small portion of the reflection generates the radiation wave R01 without excessively affecting the emission efficiency of the radiation wave R0. Similar to the embodiment of FIG. 4, FIG. 6 to FIG. 8 and FIG. 9, as shown in FIG. 11, the reflection grid set 710 can also be connected to the antenna device by means of a connecting member 720 and a slide rail. The back plate or the antenna spacer is slidably adjusted in the direction D1.

12 to 14 are schematic views of a reflection grid group 8101, a reflection grid group 8102, and a reflection grid group 8103 according to an embodiment of the present invention. The reflective grid set 8101, 8102, and 8103 are the same as the reflective grid set 710 of FIG. 10, and also include a plurality of reflective grids 7102. However, in order to enhance the structure, at least one link may be connected to multiple reflections according to an embodiment of the present invention. Gate bar. For example, in the reflection grid group 8101 of FIG. 12, the three links 81011 are connected between the two of the three reflection grids 7102. In the reflection grid group 8102 of Fig. 13, the four reflection grids 7102 are connected by a link 81021. In the reflection grid group 8103 of Fig. 14, the four reflection grids 7102 are connected by a three-bar linkage 81031. In the reflective grid set 8101, the reflective grid set 8102 and the reflective grid set 8103 disclosed in the embodiments of FIGS. 12-14, it is located between the reflective grid and the connecting rod for the gap of the radiation wave R1. (As in the gap 819 of Fig. 14), the length perpendicular to the polarization direction of the radiation wave R0 should be greater than the length parallel to the polarization direction of the radiation wave R0, for example, the length of the gap 819 parallel to the direction D2 should be greater than parallel The length of the direction D1 is such that the radiation wave R0 having the polarization direction of the direction D1 can largely penetrate the reflection grid group as shown in FIGS. 12 to 14. For example, the reflection grid group 8102 of FIG. 13 may be mounted on the connecting rod 81021, and the sliding rail is disposed at the first end of the connecting member so as to be slidable along the polarization direction, and Fixing the second end of the connecting member to the back plate of the antenna device, or the second end of the connecting member is disposed on the other sliding rail of the antenna device in a manner slidable along the polarization direction (which can be disposed on the antenna device) a back plate or an antenna spacer) to achieve a slidable adjustment of the reflective grid The effect of the rod set 8102.

In addition, as shown in the embodiments of FIGS. 6-9, the antenna device may also include two or more sets of reflective grids, and the plurality of sets of reflective grids are set by the sliding antenna to the transmitting antenna ANT _Tx and the receiving antenna ANT _Rx by sliding adjustment. The former sides completely overlap each other, partially overlap or not overlap at all, to adjust the amplitude, phase and position of the reflected radiation wave R01 to obtain a reflection grid rod corresponding to the interference effect caused by the radiation wave R11 is minimized. The location of the group. When two or more sets of reflective grids are slidably adjusted, the corresponding connecting members may be disposed on the same sliding rail or on a plurality of sliding rails to adjust the degree of overlapping of the plurality of reflective grating pole groups.

The sliding rails mentioned above may be, but are not limited to, sliding sliding rails in the form of rails, or multi-segment slide rails composed of two members each having a multi-segment row-shaped locking hole, so as to facilitate sliding adjustment of the reflector or reflection by the user. After the grid is set and its position is determined, the reflector or the reflective grid is fixed to the user's desired position by, but not limited to, screwing, soldering, or snapping.

Figure 15 is a schematic diagram showing the transmission antenna ANT _Tx and the receiving antenna ANT _Rx being misaligned to each other in the embodiment of the present invention. In the embodiment of FIG. 15, the transmitting antenna ANT _Tx and the receiving antenna ANT _Rx may be separately mounted on the backplane 930 by two sliding rails, so that the transmitting antenna ANT _Tx and the receiving antenna ANT _Rx can slide in the direction D1 to reach each other. The effect of misplacement. This operation can help the user to further fine tune the phase of the transmitting and/or receiving radiation waves of the transmitting antenna ANT _Tx and the receiving antenna ANT _Rx to obtain the best transmission/reception performance. However, theoretically, when the misalignment distance k of the two antennas is greater than half a wavelength (ie, 0.5λ), the effect is no longer increased. For example, when the misalignment distance k is (0.5λ+5mm), the effect of phase adjustment is theoretically similar to The misalignment distance k is an effect caused by 5 mm, so the misalignment distance k of the two antennas in Fig. 15 does not need to be too long. In addition, the user may install another direction parallel to the rail D2 of the transmit antenna and receive antenna ANT _Tx ANT _Rx behind, in the direction D2 to adjust the transmit antenna and the receive antenna ANT _Tx ANT _Rx distance from each other, so that two antennas may be vertically dislocation. The user can also install a retractable kit (such as a multi-stage telescopic package) between the transmitting antenna ANT _Tx and/or the receiving antenna ANT _Rx and the backplane 930 to further flexibly fine-tune the transmitting antenna ANT _Tx and/or receive. The distance between the antenna ANT _Rx and the backplane 930 is such that the two antennas are misaligned before and after to obtain an optimal radiation wave receiving effect.

The connecting member for connecting the reflecting member and the back plate or connecting the reflective grating bar group and the back plate (such as the connecting member 250 of FIG. 2, the first connecting member 5201 and the second connecting member 5202 of FIG. 6 and the The connector 720) of FIG. 11 further includes a telescopic unit (for example, a telescopic unit composed of a solid shaft and a hollow sleeve shaft; or a first sub-connector having a plurality of rows of perforations and a plurality of row screws) The second sub-connecting member of the hole is composed of a telescopic unit which can be adjusted in length after being adjusted by a screw, so that the connecting member is a connecting member whose length can be extended and contracted axially in front and rear to help the user adjust The distance between the reflector and the back plate, or the distance between the reflection grid group and the back plate is adjusted to adjust the phase of the radiation wave R01 shown in FIG. 2, and the interference of the radiation wave R11 can be minimized. The position of the reflector (or reflection grid group). In the embodiment of the present invention, it is experimentally found that when the spacing between the two reflection gratings 7102 shown in FIGS. 11 to 14 is in the range between 0.069 and 0.5 times the wavelength of the radiation wave, The influence of the field shape of the radiation wave is not significant, so the distance between the reflection grids 7102 may allow, but is not limited to, between 0.065 wavelength and 0.5 wavelength (0.065λ~0.5λ), but the reflection grid is larger or smaller than this range. The spacing of 7102 is within the scope of the invention and is available without prejudice to the efficiency and field shape of the radiation wave.

Figure 16 is a schematic view of the slide rail 1610 and the at least one auxiliary slide rail 1620 in the embodiment of the present invention. The slide rail 1610 shown in Fig. 16 is in the direction D1 (which is parallel to the polarization direction), and at least one auxiliary slide rail 1620 is in the direction D2 (which is perpendicular to the polarization direction), wherein the slide rail 1610 and the auxiliary slide rail The 1620 can be engraved and interlaced, for example, by stamping or the like. As shown in FIG. 16, the first end of the connecting member 1650 is disposed on the sliding rail 1610 and the auxiliary sliding rail 1620 so as to be slidably adjustable along the sliding rail 1610 and the plurality of auxiliary sliding rails 1620, and the connecting member 1650 The second end is set at The above-mentioned reflective member (such as the reflective member 210) or the reflective grating member group (such as the reflective grating rod group 8102), so that the reflecting member or the reflective grating rod group in the present invention can be moved parallel to the polarization direction, and then perpendicular to The polarization direction is adjusted to the optimal position. As shown in Fig. 16, the connector 1650 is first moved from position 160a to position 160b and then fine tuned to position 160c. According to another embodiment of the present invention, the slide rail 1610 and the plurality of auxiliary slide rails 1620 as shown in FIG. 16 may also be disposed on the link 81031 as shown in FIG. 14, and then the slide rail 1610 and at least one auxiliary. The slide rail 1620 is disposed on the first end of the connecting member 1650 in such a manner that the sliding rail 1610 can be slidably adjusted in the direction D1 and the auxiliary sliding rail 1620 can be adjusted in the direction D2, and the second end of the connecting member 1650 can be disposed, for example, on the antenna device. The backing plate, in turn, allows the reflective grid set 8103 to move parallel to the polarization direction and then adjust to the optimum position perpendicular to the polarization direction. When the antenna device has a plurality of reflectors or groups of reflective grids, they can each be slidably adjusted over a plurality of auxiliary rails.

In summary, the radiation member R0 emitted by the transmitting antenna ANT _Tx according to the embodiment of the present invention is the radiation wave R0 emitted by the transmitting antenna ANT _Tx as shown in FIG. 2, and the radiation wave R1 after passing through the reflecting member 210 is The radiation wave R11 generated by the inner wall of the radome 200 can be reduced or eliminated by the radiation wave R01 having the opposite phase and the same amplitude reflected by the reflector or the reflection grid group. Therefore, it is helpful for the receiving antenna ANT _{Rx to} more correctly receive the radiated wave R3 from the outside of the antenna device 200 without being interfered by the radiated wave R11. Since the reflector or the reflection grid group of the present invention is used for the gap through which the radiation wave R0 penetrates, the length of the direction D2 is greater than the length parallel to the direction D1 (where the direction D2 is perpendicular to the direction D1), so that the polarization The radiation wave R0 having the direction of the direction D1 can penetrate most of the reflector or the reflection grid group disclosed in the embodiments of the present invention without excessively affecting the emission efficiency thereof. Therefore, the reflector or the reflection grid group disclosed in the embodiment of the present invention The area may be allowed to cover the open range of the transmit antenna ANT _Tx and the receive antenna ANT _Rx . In addition, the position of the reflector or the reflection grid group disclosed in the present invention can be adjusted, so that the user can not only conveniently adjust to obtain the position of the best reflector or the reflection grid group, and does not need to be different. It is costly to remanufacture different versions of the antenna device by opening the mold. Thus, the present invention is useful for improving the deficiencies of prior art in the art.

The above description is only a preferred embodiment of the present invention, and the scope of the patent application according to the present invention is Equal variations and modifications are intended to be within the scope of the present invention.

200‧‧‧Antenna device

220‧‧‧ radome

ANT _Tx ‧‧‧ transmit antenna

ANT _Rx ‧‧‧ receiving antenna

R0, R01, R1, R11, R2, R3‧‧‧ radiation waves

230‧‧‧ Backplane

210‧‧‧reflector

250‧‧‧Connecting parts

Claims (18)

An antenna device comprising: a transmitting antenna (Tx antenna) for transmitting a radiation wave having a polarization direction toward a front side of the transmitting antenna; a receiving antenna (Rx antenna) for receiving a radiation wave; and a first reflection a first reflector disposed on the transmitting antenna and the receiving antenna to reflect the radiation wave emitted by the transmitting antenna, the first reflecting member comprising: a first frame, including two first crossbars, substantially parallel to the pole a direction, and two first longitudinal rods, substantially perpendicular to the polarization direction; and at least one first reflection grid rod, each first reflection grid rod being coupled to the two first cross bars and substantially perpendicular to the Polarization direction; a second reflection member disposed in front of the transmitting antenna and the receiving antenna for reflecting a radiation wave emitted by the transmitting antenna, the second reflecting member comprising: a second frame, including two second crosses a rod substantially parallel to the polarization direction, and two second longitudinal rods substantially perpendicular to the polarization direction; and at least one second reflection grid rod, each second reflection grid rod being coupled to the two second transverse lines Rod and substantially perpendicular to the pole Direction; and an antenna cap, which provide a receiving space for accommodating the transmitting antenna, the receiving antenna, the first reflecting member and the second reflecting member. The antenna device of claim 1, wherein the first reflecting member and the second reflecting member are movable in a direction substantially parallel to the polarization direction, so that the first reflecting member and the second reflecting member are completely Overlapping, partially overlapping, or not overlapping at all. The antenna device of claim 1, wherein the first frame of the first reflecting member and the at least The at least one first gap formed by the first reflective grating rod has a length perpendicular to the polarization direction greater than a length parallel to the polarization direction; and the second frame of the second reflection member and the at least one The at least one second gap formed by the second reflective grid has a length perpendicular to the polarization direction that is greater than a length parallel to the polarization direction. The antenna device of claim 1, further comprising at least one auxiliary slide rail, such that the first reflective member and/or the second reflective member are perpendicular to the polarization direction by the at least one auxiliary slide rail Move adjustments. An antenna device comprising: a transmitting antenna (Tx antenna) for transmitting a radiated wave having a polarization direction toward a front side of the transmitting antenna; a receiving antenna (Rx antenna) for receiving a radiated wave; and a reflecting member, The reflector is disposed in front of the transmitting antenna and the receiving antenna for reflecting a radiation wave emitted by the transmitting antenna, and the reflecting component comprises: a frame comprising two crossbars substantially parallel to the polarization direction, and two longitudinal rods, Substantially perpendicular to the polarization direction; and at least one reflective grid, each of the reflective grids being coupled to the two rails and substantially perpendicular to the polarization direction; and a radome providing an accommodation space The receiving antenna, the receiving antenna and the reflector are received. The antenna device of claim 5, further comprising a slide rail substantially parallel to the polarization direction, the antenna device further comprising a connecting member, the first end of which is fixed to the reflective member, and the second end is It can be disposed on the sliding rail along the sliding rail. The antenna device of claim 5, wherein each of the at least one gap formed by the frame and the at least one reflective grid has a length perpendicular to the polarization direction that is greater than a direction parallel to the polarization direction. length. The antenna device of claim 5, further comprising at least one auxiliary slide rail for adjusting the reflector by the movement of the at least one auxiliary slide rail in a direction perpendicular to the polarization direction. An antenna device comprising: a transmitting antenna (Tx antenna) for transmitting a radiation wave having a polarization direction toward a front side of the transmitting antenna; and a receiving antenna (Rx antenna) for receiving a radiation wave; a reflective grid comprising a plurality of reflective grids disposed in front of the transmitting antenna and the receiving antenna for reflecting radiation waves emitted by the transmitting antenna, each reflecting grid being substantially perpendicular to the polarization direction; and one day The wire cover provides an accommodating space for accommodating the transmitting antenna, the receiving antenna and the first set of reflective grating bars. The antenna device of claim 9, further comprising a slide rail substantially parallel to the polarization direction, the antenna device further comprising a connecting member, the first end of which is fixed to the first set of reflective grid bars, The two ends are disposed on the slide rail so as to be slidable along the slide rail. The antenna device of claim 9, further comprising at least one auxiliary rail for adjusting the movement of the first group of reflective grids by the at least one auxiliary rail in a direction perpendicular to the polarization direction. The antenna device of claim 9, further comprising a second set of reflective gratings disposed in front of the transmitting antenna and the receiving antenna for reflecting radiation waves emitted by the transmitting antenna, the second The set of reflective grids includes a reflective grid that is substantially perpendicular to the direction of polarization, wherein the accommodating space further houses the second set of reflective grids. The antenna device of claim 12, wherein the first set of reflective grating bars and the second set of reflective grating bars are movable in a direction substantially parallel to the polarization direction such that the first set of reflective grating bars The second set of reflective grids are completely overlapping, partially overlapping or not overlapping at all. The antenna device of claim 9, further comprising a connecting rod connected to at least two reflective grating bars of the first set of reflective grating bars. The antenna device of claim 14, further comprising a slide rail, a backboard and a connecting member, wherein the transmitting antenna and the receiving antenna are disposed on the backboard, the sliding rail is substantially parallel to the polarization direction The slide rail is fixed on the connecting rod, and the slide rail is disposed at a first end of the connecting member in a manner of sliding along the polarization direction, and the second end of the connecting member is fixed to the back end board. The antenna device of claim 14, further comprising a first slide rail, a second slide rail and a connecting member, the first slide rail and the second slide rail being substantially parallel to the polarization direction, the first a sliding rail is fixed on the connecting rod, and the first sliding rail is disposed at a first end of the connecting member in a manner of sliding along the polarization direction, and the second end of the connecting member is adjacent to The direction in which the polarization direction slides is disposed on the second slide rail. The antenna device of claim 6, 10, 15 or 16, wherein the connecting member further comprises a telescopic unit to telescope the connecting member in a front-rear direction to adjust the length. The antenna device of claim 1, 5 or 9, wherein the transmitting antenna and the receiving antenna are misaligned left and right, offset up and down and/or misaligned.