CN213636315U - Combined antenna applied to road side unit - Google Patents

Abstract

The utility model relates to the technical field of antennas, in particular to a combined antenna applied to a road side unit, which comprises transceiver equipment, a broadband high-gain dual-frequency antenna, a broadband omnidirectional antenna and an active antenna; a first PCB and a first connecting cable are arranged in the broadband high-gain dual-frequency antenna; the first PCB is provided with a 2.4GHz radiation array unit, a 5GHz radiation array unit and a combiner; a second PCB and a second connecting cable are arranged in the broadband omnidirectional antenna; the second PCB board is provided with a first radiation oscillator and a coupling oscillator. The utility model integrates a plurality of antennas on the transceiver device, so that the combined antenna comprises a plurality of frequency bands; the bandwidth of the combined antenna is greatly increased, and the combined antenna has a simpler structure and smaller size and can provide better radiation performance indexes by utilizing a dielectric microstrip technology, a frequency division confluence technology, a broadband technology and a coupling resonance technology.

Description

Combined antenna applied to road side unit

Technical Field

The utility model relates to an antenna technology field, concretely relates to use combination antenna at trackside unit.

Background

The RSU is an English abbreviation of Road Side Unit, is the meaning of a roadside Unit, is an ETC system, is installed at the roadside, and is a device for realizing vehicle identification and electronic deduction by adopting a DSRC (differentiated Short Range communication) technology and communicating with a vehicle-mounted Unit; in the management of highways and parking lots, the RSU is installed at the roadside, an unattended rapid special channel can be established, services such as high-precision positioning of vehicles, high-precision maps and the like can be provided, and a safer and more convenient intelligent traffic world is achieved through the communication;

the existing road side unit has the problems of large size and narrow bandwidth.

SUMMERY OF THE UTILITY MODEL

The utility model aims at the above-mentioned among the prior art not enough, provide an use at the combined antenna of trackside unit, the structure is comparatively simple, the size is less, can provide better radiation performance index to can match with the link in the transceiver equipment.

The purpose of the utility model is realized through the following technical scheme: a combined antenna applied to a road side unit comprises transceiver equipment, a broadband high-gain dual-frequency antenna, a broadband omnidirectional antenna and an active antenna;

the broadband high-gain dual-frequency antenna, the broadband omnidirectional antenna and the active antenna are respectively arranged on the transceiver equipment;

a first PCB and a first connecting cable are arranged in the broadband high-gain dual-frequency antenna; the first PCB is provided with a 2.4GHz radiation array unit, a 5GHz radiation array unit and a combiner; the first connecting cable is respectively connected with the 2.4GHz radiation array unit and the 5GHz radiation array unit through a combiner;

a second PCB and a second connecting cable are arranged in the broadband omnidirectional antenna; the second PCB is provided with a first radiation oscillator and a coupling oscillator; the second connecting cable is connected with the first radiating oscillator for feeding; the second connecting cable is coupled with the coupling oscillator for feeding.

The utility model discloses further set up as, the 5GHz radiation array unit includes the first 5GHz radiation array unit that locates the positive top of first PCB board and locates the second 5GHz radiation array unit of the back top of first PCB board; the 2.4GHz radiation array unit comprises a first 2.4GHz radiation array unit arranged at the bottom of the front surface of the first PCB and a second 2.4GHz radiation array unit arranged at the bottom of the back surface of the first PCB;

the combiner comprises a frequency division integrated circuit arranged on the front surface of the first PCB and a grounding sheet arranged on the back surface of the first PCB; the second 5GHz radiation array unit and the second 2.4GHz radiation array unit are respectively connected with the grounding plate; the frequency division integrated circuit is provided with a first output section and a second output section; the first 5GHz radiation array unit and the first 2.4GHz radiation array unit are respectively connected with the first output section and the second output section;

the core layer of the first connecting cable is connected with the frequency division integrated circuit; the braided layer and the ground lug of first connecting cable are connected.

The utility model is further arranged that the frequency division integrated circuit comprises a first feed port; the first output section and the second output section are respectively arranged at two ends of the first feed port; a high-frequency feed network is arranged between the first output section and the first 5GHz radiation array unit; a low-frequency feed network is arranged between the second output section and the first 2.4GHz radiation array unit; the first feed port is connected with a wire core layer of the connecting cable.

The utility model is further arranged in that the high-frequency feed network comprises a high-frequency connecting line connected with the first output section; a first open-circuit branch and a second open-circuit branch are arranged on one side of the high-frequency connecting wire; a third open branch and a fourth open branch are arranged on the other side of the high-frequency connecting line; the high-frequency connecting wire is provided with a first impedance matcher at the joint of the first open-circuit branch and the third open-circuit branch; a second impedance matcher is arranged on the third opening branch; a third impedance matcher is arranged at the joint of the high-frequency connecting wire and the second open-circuit branch; a fourth impedance matcher is arranged between the high-frequency connecting line and the first 5GHz radiation array unit;

the direction of the first open-circuit branch is opposite to that of the second open-circuit branch; the direction of the third opening branch is opposite to that of the fourth opening branch; the direction of the first open-circuit branch is the same as that of the third open-circuit branch;

the low-frequency feed network comprises a low-frequency connecting line connected with the second output section; a fifth open-circuit branch knot, a sixth open-circuit branch knot and a seventh open-circuit branch knot are arranged on one side of the low-frequency connecting line; an eighth open-circuit branch is arranged on one side of the low-frequency connecting line; the low-frequency connecting line is provided with a bending section between the sixth open-circuit branch and the eighth open-circuit branch; the direction of the fifth open-circuit branch is opposite to that of the sixth open-circuit branch; and the direction of the sixth open-circuit branch is the same as that of the eighth open-circuit branch.

The utility model discloses it is further arranged that the first 5GHz radiation array unit comprises a plurality of 5GHz radiation oscillators; a first microstrip transmission line is arranged between the first output section and the 5GHz radiation oscillator; a first microstrip transmission line and a high-frequency impedance transformation line are arranged between two adjacent 5GHz radiation oscillators;

the first 2.4GHz radiation array unit comprises a plurality of 2.4GHz radiation oscillators; a second microstrip transmission line is arranged between the second output section and the 2.4GHz radiation oscillator; a second microstrip transmission line and a low-frequency impedance transformation line are arranged between two adjacent 2.4GHz radiation oscillators;

a through hole is arranged between the frequency division integrated circuit and the grounding sheet; the braid of the first connection cable is connected with the through hole;

the first 5GHz radiation array unit and the second 5GHz radiation array unit are symmetrical half-wave 5GHz radiation oscillators; the first 2.4GHz radiation array unit and the second 2.4GHz radiation array unit are symmetrical half-wave 2.4GHz radiation oscillators;

the lengths of the 5GHz radiation oscillator and the 2.4GHz radiation oscillator are all quarter wavelengths;

the length of the first PCB is 375mm-397mm, the width of the first PCB is 13.2mm-15.2mm, and the thickness of the first PCB is 0.80mm-1.20 mm;

the first PCB is made of an F4BM-2 double-sided copper-clad plate; the dielectric constant of the first PCB is 1-4;

the first connecting cable is a 50 ohm tinned cable; the outer diameter of the core wire of the first connecting cable is 0.3mm-0.7mm, the outer diameter of the medium of the first connecting cable is 1.6mm-2.0mm, and the outer diameter of the shielding layer of the first connecting cable is 2.0mm-2.5 mm;

the grounding piece is in a convex shape, the length of the grounding piece is 62.3mm-70.5mm, and the width of the grounding piece is 13.4mm-15.7 mm;

the broadband high-gain dual-frequency antenna also comprises a first glass fiber reinforced plastic cap, a first glass fiber reinforced plastic outer cover, a first aluminum sleeve and a first joint; the first joint and the first glass fiber reinforced plastic cap are respectively arranged at two ends of the first glass fiber reinforced plastic outer cover; the first aluminum sleeve is arranged between the first joint and the first glass fiber reinforced plastic outer cover; the first PCB and the first connecting cable are arranged in the first glass fiber reinforced plastic outer cover; the first connecting cable is connected with the first connector.

The utility model is further arranged that a second feed port, a grounding wire and a bending microstrip line are arranged on the second PCB;

the core layer of the second connecting cable is connected with the second feed port; the braided layer of the second connecting cable is connected with the grounding wire; one end of the coupling oscillator is connected with a grounding wire; the other end of the coupling oscillator is connected with the bent microstrip line; the coupling oscillator is coupled with the feed port for feeding; the first radiating oscillator is connected with the feed port.

The utility model is further arranged that the first radiation oscillator is arranged on the top of the second PCB board; the bent microstrip line is arranged at the bottom of the second PCB; the coupling vibrators are arranged on two sides of the second feed port and two sides of the grounding wire; the coupling oscillator is arranged between the first radiation oscillator and the bent microstrip line;

a gradient microstrip line is arranged between the coupling oscillator and the second feed port; the coupling oscillators are arranged on two sides of the gradient microstrip line;

the coupling oscillator comprises a first coupling part and a second coupling part; the width of the second coupling part is larger than that of the first coupling part; the first coupling part is connected with a grounding wire; the second coupling part is connected with the bent microstrip line;

the first radiating oscillator comprises a first radiating part and a second radiating part; the first radiation part is arranged at the top of the second radiation part; one side of the second radiation part is inwards sunken to form an inwards concave arc surface; a conical opening is formed between the second radiation part and the gradual change type microstrip line;

the first radiation part consists of a semicircular radiation body at the top and a rectangular radiation body at the bottom.

The utility model is further arranged that the material of the second PCB board is FR4 single-sided copper-clad plate;

the length of the second PCB is 105mm-120mm, the width of the second PCB is 13.2mm-14.2mm, the thickness of the second PCB is 0.40mm-0.80mm, and the dielectric constant of the second PCB is 4.0-5.0;

the length of the first radiation oscillator is a quarter wavelength;

the second connecting cable is a 50 ohm tinned cable; the outer diameter of a core wire of the second connecting cable is 0.3mm-0.7mm, the outer diameter of a medium of the second connecting cable is 1.6mm-2.0mm, and the outer diameter of a shielding layer of the second connecting cable is 2.0mm-2.5 mm;

the broadband omnidirectional antenna also comprises a second glass fiber reinforced plastic cap, a second glass fiber reinforced plastic outer cover, a second aluminum sleeve and a second joint; the second joint and the second glass fiber reinforced plastic cap are respectively arranged at two ends of the second glass fiber reinforced plastic outer cover; the second aluminum sleeve is arranged between the second joint and the second glass fiber reinforced plastic outer cover; the second PCB and the second connecting cable are arranged in the second glass fiber reinforced plastic outer cover; the second connecting cable is connected with the second connector.

The utility model is further arranged in that the active antenna comprises an antenna housing and a third joint connected with the antenna housing, and a ceramic plate, an active circuit board, a mounting steel plate and a third connecting cable are arranged in the antenna housing; the installation steel sheet is fixed in the antenna house, potsherd and active circuit board installation are fixed on the installation steel sheet, potsherd and active circuit board pass through welded connection and switch on, the one end and the active circuit board welded fastening of third connecting cable switch on, the other end and the third of third connecting cable connect welded fastening and switch on.

The utility model is further arranged that the shape of the antenna housing is mushroom head shape; the height of the antenna housing is 105mm-115mm, the diameter of the antenna housing is 103mm-113mm, and the antenna housing is made of ultraviolet-proof ABS;

the thickness of the mounting steel plate is 0.35mm-0.55mm, the diameter of the mounting steel plate is 86.5mm-90.7mm, and the mounting steel plate is made of a nickel-plated steel plate;

the length of the ceramic wafer is 8mm-35mm, the width of the ceramic wafer is 8mm-35mm, the thickness of the ceramic wafer is 2mm-8mm, and the dielectric constant of the ceramic wafer is 8mm-30 mm;

the outer diameter of the active circuit board is 53.3mm-77.5mm, the thickness of the active circuit board is 1.23mm-2.35mm, and the dielectric constant of the active circuit board is 4.0-5.0; the active circuit board is made of a PCB.

The utility model has the advantages that: the utility model integrates the broadband high-gain dual-band antenna, the broadband omnidirectional antenna and the active antenna on the transceiver device, so that the combined antenna comprises a plurality of frequency bands; the bandwidth of the combined antenna is greatly increased, and the combined antenna has a simpler structure and smaller size and can provide better radiation performance indexes by utilizing a dielectric microstrip technology, a frequency division confluence technology, a broadband technology and a coupling resonance technology.

Drawings

The invention is further described with the aid of the accompanying drawings, in which, however, the embodiments do not constitute any limitation to the invention, and for a person skilled in the art, other drawings can be derived from the following drawings without inventive effort.

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic structural view of the broadband high-gain dual-band antenna of the present invention;

fig. 3 is a schematic structural view of the front side of the first PCB of the present invention;

fig. 4 is a schematic structural view of the back surface of the first PCB and the first connecting cable of the present invention;

FIG. 5 is a schematic structural diagram of the frequency division integrated circuit of the present invention;

fig. 6 is a schematic structural diagram of the wideband omnidirectional antenna of the present invention;

fig. 7 is a schematic structural view of a second PCB board and a second connecting cable according to the present invention;

fig. 8 is a schematic structural diagram of the active antenna of the present invention;

fig. 9 is a schematic structural view of the ceramic sheet of the present invention;

FIG. 10 is a schematic structural view of the installation steel plate of the present invention;

fig. 11 is a schematic structural view of a third connection cable and a third joint according to the present invention;

fig. 12 is a standing wave diagram of the broadband high-gain dual-band antenna of the present invention;

fig. 13 is a directional diagram of the broadband high-gain dual-band antenna of the present invention tested at 2400 MHz;

fig. 14 is a directional diagram of the broadband high-gain dual-band antenna tested at 2450MHz according to the present invention;

fig. 15 is a directional diagram of the broadband high-gain dual-band antenna of the present invention tested at 2500 MHz;

fig. 16 is a directional diagram of the broadband high-gain dual-band antenna of the present invention tested at 5150 MHz;

fig. 17 is a directional diagram of the broadband high-gain dual-band antenna of the present invention tested at 5500 MHz;

fig. 18 is a directional diagram of the broadband high-gain dual-band antenna of the present invention tested at 5850 MHz;

fig. 19 is a standing wave diagram of the wideband omni-directional antenna of the present invention;

fig. 20 is a directional diagram of the wideband omni-directional antenna of the present invention tested at 824 MHz;

fig. 21 is a directional diagram of the wideband omni-directional antenna of the present invention tested at 1710 MHz;

figure 22 is a pattern for the 2170MHz test of the broadband omni-directional antenna of the present invention;

fig. 23 is a directional diagram of the wideband omnidirectional antenna of the present invention tested at 2300 MHz;

fig. 24 is a directional diagram of the wideband omnidirectional antenna of the present invention tested at 2500 MHz;

fig. 25 is a directional diagram of the wideband omni-directional antenna of the present invention tested at 2700 MHz;

fig. 26 is a directional diagram of the broadband omni-directional antenna of the present invention tested at 3600 MHz;

fig. 27 is a standing wave diagram of the active antenna of the present invention;

fig. 28 is a signal strength test chart of the active antenna of the present invention;

wherein: 1. a transceiver device; 2. a broadband high-gain dual-band antenna; 21. a first PCB board; 221. a first 5GHz radiating array element; 222. a second 5GHz radiating array element; 223. a 5GHz radiating oscillator; 224. a first microstrip transmission line; 225. a high-frequency impedance transformation line; 231. a first 2.4GHz radiating array element; 232. a second 2.4GHz radiating array element; 233. a 2.4GHz radiating oscillator; 234. a low frequency impedance transformation line; 235. a second microstrip transmission line; 241. a frequency division integrated circuit; 242. a ground plate; 243. perforating; 251. a first output section; 252. a second output section; 253. a first feed port; 26. a high-frequency connection line; 261. a first open circuit limb; 262. a second open circuit branch; 263. a third branch section; 264. A fourth branch segment; 265. a first impedance matcher; 266. a second impedance matcher; 267. a third impedance matcher; 268. a fourth impedance matcher; 27. a low frequency connection line; 271. a fifth open circuit branch; 272. a sixth open circuit branch; 273. A seventh open circuit branch; 274. the eighth open circuit branch; 28. bending the section; 291. a first glass fiber reinforced plastic cap; 292. a first fiberglass outer cover; 293. a first aluminum jacket; 294. a first joint; 295. a first connection cable; 3. a wide-band omnidirectional antenna; 31. A second PCB board; 32. a second feed port; 33. a ground line; 34. a first radiation oscillator; 341. a first radiation section; 342. A second radiation section; 35. a coupling oscillator; 351. a first coupling part; 352. a second coupling part; 36. a bent microstrip line; 37. a tapered microstrip line; 381. an inner concave arc-shaped surface; 382. a tapered mouth; 391. a second glass fiber reinforced plastic cap; 392. a second glass fiber reinforced plastic housing; 393. a second aluminum sheath; 394. a second joint; 395. a second connection cable; 4. an active antenna; 41. an antenna cover; 42. a third joint; 43. a ceramic plate; 45. installing a steel plate; 46. and a third connecting cable.

Detailed Description

The invention will be further described with reference to the following examples.

As can be seen from fig. 1 to 9, the combined antenna applied to the rsu in this embodiment includes a transceiver device 1, a wideband high-gain dual-band antenna 2, a wideband omnidirectional antenna 3, and an active antenna 4;

the broadband high-gain dual-band antenna 2, the broadband omnidirectional antenna 3 and the active antenna 4 are respectively arranged on the transceiver equipment 1;

the broadband high-gain dual-band antenna 2 is internally provided with a first PCB 21 and a first connecting cable 295; the first PCB 21 is provided with a 2.4GHz radiation array unit, a 5GHz radiation array unit and a combiner; the first connecting cable 295 is connected to the 2.4GHz radiation array unit and the 5GHz radiation array unit through a combiner;

a second PCB 31 and a second connecting cable 395 are arranged in the broadband omnidirectional antenna 3; the second PCB 31 is provided with a first radiating oscillator 34 and a coupling oscillator 35; the second connection cable 395 is connected to the first radiating element 34 for feeding; the second connecting cable 395 is coupled to the coupler element 35.

Specifically, the active antenna 4 may be a GPS active antenna 4 and/or a beidou active antenna 4, and in this embodiment, the wideband high-gain dual-band antenna 2, the wideband omnidirectional antenna 3, and the active antenna 4 are integrated on the transceiver device 1, so that the frequency bands of the combined antenna include a WLAN and WIFI frequency band (2400MHz-2500MHz/5150MHz-5850MHz), a 2G, 3G, 4G, and 5G frequency band (698MHz-960MHz/1710MHz-49000MHz), and a GPS/beidou frequency band (1559MHz-1580 MHz); the bandwidth of the combined antenna is greatly increased, and the structure of the antenna is simpler, the size of the antenna is smaller and better radiation performance indexes can be provided by utilizing a dielectric microstrip technology, a frequency division confluence technology, a broadband technology and a coupling resonance technology.

As shown in fig. 2 to 5, the combined antenna applied to the road side unit according to the embodiment includes a first 5GHz radiation array unit 221 disposed on the top of the front surface of the first PCB 21 and a second 5GHz radiation array unit 222 disposed on the top of the back surface of the first PCB 21; the 2.4GHz radiation array unit comprises a first 2.4GHz radiation array unit 231 arranged at the bottom of the front surface of the first PCB 21 and a second 2.4GHz radiation array unit 232 arranged at the bottom of the back surface of the first PCB 21;

the combiner comprises a frequency division integrated circuit 241 arranged on the front surface of the first PCB 21 and a grounding strip 242 arranged on the back surface of the first PCB 21; the second 5GHz radiation array unit 222 and the second 2.4GHz radiation array unit 232 are respectively connected to the ground strip 242; the frequency division and integration circuit 241 is provided with a first output section 251 and a second output section 252; the first 5GHz radiation array unit 221 and the first 2.4GHz radiation array unit 231 are respectively connected to the first output section 251 and the second output section 252;

the core layer of the first connecting cable 295 is connected to the frequency division combining line 241; the braid of the first connecting cable 295 is connected to the ground plate 242.

Specifically, the broadband high-gain dual-band antenna according to this embodiment can save the space of the antenna by integrating the combiner on the first PCB 21, thereby achieving miniaturization; during radiation, the energy of the first connecting cable 295 is transmitted to the first 5GHz radiation array unit 221 and the first 2.4GHz radiation array unit 231 through the frequency division combining line 241 for radiation, so as to achieve a broadband effect; in addition, by providing the first 5GHz radiation array element 221 and the first 2.4GHz radiation array element 231, the gain of the antenna can be effectively increased, and broadband, high gain, and miniaturization can be achieved.

In the combined antenna applied to the road side unit in this embodiment, the frequency division combining line 241 includes a first feeding port 253; the first output section 251 and the second output section 252 are respectively disposed at two ends of the first feeding port 253; a high-frequency feed network is arranged between the first output section 251 and the first 5GHz radiation array unit 221; a low-frequency feed network is arranged between the second output section 252 and the first 2.4GHz radiation array unit 231; the first feeding port 253 is connected with a core layer of the connecting cable. When the radiation is performed through the above arrangement, the energy of the first connecting cable 295 is transmitted to the first 5GHz radiation array unit 221 and the first 2.4GHz radiation array unit 231 through the frequency division combining line 241 for radiation, so as to achieve a broadband effect.

In the combined antenna applied to the road side unit according to this embodiment, the high frequency feeding network includes the high frequency connection line 26 connected to the first output section 251; a first open-circuit branch 261 and a second open-circuit branch 262 are arranged on one side of the high-frequency connecting wire 26; a third open branch 263 and a fourth open branch 264 are arranged on the other side of the high-frequency connecting line 26; the high-frequency connection line 26 is provided with a first impedance matcher 265 at the connection position of the first open-circuit branch 261 and the third open-circuit branch 263; a second impedance matcher 266 is arranged on the third opening branch 263; the high-frequency connection line 26 is provided with a third impedance matcher 267 at the connection part with the second open-circuit branch 262; a fourth impedance matcher 268 is arranged between the high-frequency connecting wire 26 and the first 5GHz radiation array unit 221; the direction of the first open-circuit stub 261 is opposite to the direction of the second open-circuit stub 262; the direction of the third open branch 263 is opposite to the direction of the fourth open branch 264; the direction of the first open-circuit branch 261 is the same as the direction of the third open-circuit branch 263; the low frequency feed network comprises a low frequency connection line 27 connected to the second output section 252; a fifth open-circuit branch 271, a sixth open-circuit branch 272 and a seventh open-circuit branch 273 are arranged on one side of the low-frequency connecting line 27; an eighth open-circuit branch 274 is arranged on one side of the low-frequency connecting line 27; the low-frequency connecting line 27 is provided with a bending section 28 between the sixth open-circuit branch 272 and the eighth open-circuit branch 274; the direction of the fifth open-circuit branch 271 is opposite to the direction of the sixth open-circuit branch 272; the direction of the sixth open-circuit branch 272 is the same as the direction of the eighth open-circuit branch 274.

Specifically, in this embodiment, by providing the first open-circuit branch 261, the second open-circuit branch 262, the third open-circuit branch 263, the fourth open-circuit branch 264, the fifth open-circuit branch 271, the sixth open-circuit branch 272, the seventh open-circuit branch 273, the eighth open-circuit branch 274, the first impedance matcher 265, the second impedance matcher 266, the third impedance matcher 267, and the fourth impedance matcher 268, the antenna realizes impedance matching, and achieves broadband and high-gain effects.

In the combined antenna applied to the road side unit in this embodiment, the first 5GHz radiation array unit 221 includes a plurality of 5GHz radiation oscillators 223; a first microstrip transmission line 224 is arranged between the first output section 251 and the 5GHz radiation oscillator 223; a first microstrip transmission line 224 and a high-frequency impedance transformation line 225 are arranged between two adjacent 5GHz radiation oscillators 223; by arranging a plurality of 5GHz radiating elements 223 and connecting them in a series feed manner for radiation, the gain of the antenna in the 5G frequency band can be greatly improved.

The first 2.4GHz radiation array unit 231 includes a plurality of 2.4GHz radiation oscillators 233; a second microstrip transmission line 235 is arranged between the second output section 252 and the 2.4GHz radiation oscillator 233; a second microstrip transmission line 235 and a low-frequency impedance transformation line 234 are arranged between two adjacent 2.4GHz radiating oscillators 233; by arranging a plurality of 2.4GHz radiating oscillators 233 and connecting them in a series feed manner for radiation, the gain of the antenna in the 2.4G frequency band can be greatly improved.

A through hole 243 is arranged between the frequency division integrated circuit 241 and the grounding sheet 242; the braid of the first connecting cable 295 is connected to the perforations 243; the first 5GHz radiation array unit 221 and the second 5GHz radiation array unit 222 are symmetrical half-wave 5GHz radiation oscillators 223; the first 2.4GHz radiation array unit 231 and the second 2.4GHz radiation array unit 232 are symmetrical half-wave 2.4GHz radiation oscillators 233;

the radiation surfaces of the 2.4GHz radiation oscillator 233 and the 5GHz band radiation oscillator are designed into a sector arc shape; the radiation surface of the radiation oscillator is designed into a shape with taper and radian, so that the bandwidth can be increased, the coupling resonance effect is realized in the aspect of impedance matching, the characteristics of low standing wave and wide frequency band are formed, and the perfect electrical performance index can be achieved in a limited space and a limited volume.

The lengths of the 5GHz radiation oscillator 223 and the 2.4GHz radiation oscillator 233 are both quarter wavelengths; the wavelength is a spatial free wavelength of a central frequency point;

the length of the first PCB board 21 is 375mm-397mm, the width of the first PCB board 21 is 13.2mm-15.2mm, and the thickness of the first PCB board 21 is 0.80mm-1.20 mm;

the first PCB 21 is made of an F4BM-2 double-sided copper-clad plate; the dielectric constant of the first PCB 21 is 1-4;

the first connecting cable 295 is a 50 ohm tinned cable; the outer diameter of the core wire of the first connecting cable 295 is 0.3mm to 0.7mm, the outer diameter of the medium of the first connecting cable 295 is 1.6mm to 2.0mm, and the outer diameter of the shielding layer of the first connecting cable 295 is 2.0mm to 2.5 mm;

the grounding piece 242 is in a convex shape, the length of the grounding piece 242 is 62.3mm-70.5mm, and the width of the grounding piece 242 is 13.4mm-15.7 mm;

specifically, by using a dielectric microstrip technology, a frequency division confluence technology, a broadband technology and a coupling resonance technology, the radiating oscillator, the microstrip transmission line, the impedance transformation line, the open-circuit branch and the grounding piece 242 are designed into irregular shapes, and by changing the shape of the radiating oscillator, the size and the shape of the microstrip transmission line, the impedance transformation line and the open-circuit branch and the distance between the microstrip transmission lines, better electrical performance parameters of the antenna are obtained.

On the frequency division integrated circuit 241, four open-circuit devices (open-circuit branches) are respectively arranged on the low-frequency feed network and the high-frequency feed network, and four impedance matchers are arranged on the high-frequency feed network, so that two frequency bands can be combined into one, and the dual-frequency characteristic is shown.

The broadband high-gain dual-band antenna 2 further comprises a first glass fiber reinforced plastic cap 291, a first glass fiber reinforced plastic housing 292, a first aluminum sleeve 293 and a first connector 294; the first joint 294 and the first glass fiber reinforced plastic cap 291 are respectively arranged at two ends of the first glass fiber reinforced plastic outer cover 292; the first aluminum sleeve 293 is arranged between the first joint 294 and the first glass fiber reinforced plastic outer cover 292; the first PCB board 21 and the first connecting cable 295 are both disposed in the first glass fiber reinforced plastic housing 292; the first connecting cable 295 is connected to the first connector 294.

As shown in fig. 6 and fig. 7, in the combined antenna applied to the road side unit according to the embodiment, the second PCB 31 is further provided with a second feeding port 32, a ground line 33, and a meander-type microstrip line 36;

the core layer of the second connection cable 395 is connected to the second feed port 32; the braid of the second connecting cable 395 is connected to the ground wire 33; one end of the coupling oscillator 35 is connected with the grounding wire 33; the other end of the coupling oscillator 35 is connected with the bent microstrip line 36; the coupling oscillator 35 is coupled with a feed port for feeding; the first radiating element 34 is connected to a feed port.

Specifically, in the broadband omnidirectional antenna 3 according to this embodiment, the first radiation oscillator 34 and the coupling oscillator 35 are simultaneously disposed on the second PCB 31, the second feed port 32 is directly connected to the first radiation oscillator 34 through the gradient microstrip line 37 to generate radiation, the coupling oscillator 35 is indirectly connected to the second feed port 32, and the coupling oscillator 35 radiates in a coupling feeding manner, so that the frequency band of the antenna can be widened; in addition, by arranging the bent microstrip line 36, the bent microstrip line 36 can achieve better electrical performance indexes in effective volume and space by using a transmission line bending design method, can make up for the defect of the length of the transmission line in limited space, not only can increase the bandwidth, but also can play a role in coupling resonance in impedance matching, so that the antenna is suitable for the 698-4900MHz frequency band.

In the combined antenna applied to the road side unit in this embodiment, the first radiating element 34 is disposed on the top of the second PCB board 31; the bent microstrip line 36 is arranged at the bottom of the second PCB board 31; the coupling oscillators 35 are arranged on two sides of the second feed port 32 and two sides of the grounding wire 33; the coupling oscillator 35 is arranged between the first radiation oscillator 34 and the bent microstrip line 36; specifically, the ground line 33 is provided on both sides of the second feed port 32 while the coupled oscillator 35 is provided on both sides of the ground line 33, and the first radiation oscillator 34 and the meander-type microstrip line 36 are provided on the top of the coupled oscillator 35 and the bottom of the coupled oscillator 35, respectively, so that the space can be effectively utilized and the antenna can be miniaturized.

A gradient microstrip line 37 is arranged between the coupling oscillator 35 and the second feed port 32; the coupling oscillator 35 is arranged on two sides of the gradient microstrip line 37; the impedance matching of the antenna is realized through the arrangement.

The coupling element 35 includes a first coupling portion 351 and a second coupling portion 352; the width of the second coupling portion 352 is greater than the width of the first coupling portion 351; the first coupling portion 351 is connected to the ground line 33; the second coupling portion 352 is connected to the meander microstrip line 36; the space of the second PCB board 31 can be effectively utilized by the above arrangement, and the bandwidth of the antenna can be increased.

The first radiating element 34 includes a first radiating portion 341 and a second radiating portion 342; the first radiating part 341 is disposed on the top of the second radiating part 342; one side of the second radiation part 342 is recessed inwards to form an inwards concave arc surface 381; a tapered port 382 is arranged between the second radiating part 342 and the gradient microstrip line 37; specifically, in the present embodiment, the radiation surface of the second radiation part 342 is designed into the tapered mouth 382 and the inner concave arc surface 381 with a radian, so that the electrical length from the feeding point to the top of the first radiation part 341 is gradually changed, which is equal to that the upper part of the first radiation element 34 is connected with different smooth transition sections, so that the current reflection along the surface of the antenna is small, thereby effectively widening the impedance and the bandwidth, and realizing the broadband characteristic of the antenna. Therefore, the arrangement can increase the bandwidth, simultaneously plays a role in coupling resonance in the aspect of impedance matching, forms the characteristics of low standing wave and wide frequency band, and can achieve perfect electrical performance indexes in limited space and volume.

The first radiating portion 341 is composed of a semicircular radiator at the top and a rectangular radiator at the bottom. The first radiation oscillator 34 is in the shape of a dragon-like moon-like knife; the above arrangement can increase the bandwidth of the antenna.

In the combined antenna applied to the road side unit in this embodiment, the second PCB board 31 is made of an FR4 single-sided copper-clad board;

the length of the second PCB 31 is 105mm-120mm, the width of the second PCB 31 is 13.2mm-14.2mm, the thickness of the second PCB 31 is 0.40mm-0.80mm, and the dielectric constant of the second PCB 31 is 4.0-5.0;

the length of the first radiating element 34 is a quarter wavelength; the wavelength is a spatial free wavelength of a central frequency point;

the second connecting cable 395 is a 50 ohm tinned cable; the outer diameter of the core wire of the second connecting cable 395 is 0.3mm-0.7mm, the outer diameter of the medium of the second connecting cable 395 is 1.6mm-2.0mm, and the outer diameter of the shielding layer of the second connecting cable 395 is 2.0mm-2.5 mm;

the embodiment can obtain better electrical performance parameters of the antenna by changing the size and the shape of the gradient microstrip line 37 and the bending microstrip line 36 and the distance between the gradient microstrip line 37 and the bending microstrip line 36, thereby omitting the complex design of an impedance matching network, ensuring the miniaturization of the antenna, enabling the antenna to be applied to transceiver equipment 1 with limited size, having high utilization rate of antenna radiation area, strong anti-interference capability, providing good electrical performance parameters, and not interfering with each other, enabling the impedance of the antenna and the characteristic impedance of the transceiver equipment 1 to form conjugate matching, and further achieving perfect electrical performance indexes in limited volume and space.

The wideband omnidirectional antenna 3 further comprises a second glass fiber reinforced plastic cap 391, a second glass fiber reinforced plastic cover 392, a second aluminum sleeve 393 and a second joint 394; the second joint 394 and the second glass fiber reinforced plastic cap 391 are respectively arranged at two ends of the second glass fiber reinforced plastic outer cover 392; the second aluminum sleeve 393 is disposed between the second connector 394 and the second glass fiber reinforced plastic housing 392; the second PCB board 31 and the second connecting cable 395 are both disposed in the second glass fiber reinforced plastic housing 392; the second connecting cable 395 is connected to a second connector 394.

As shown in fig. 8 to 11, in the combined antenna applied to the roadside unit according to the embodiment, the active antenna 4 includes a radome 41 and a third connector 42 connected to the radome 41, and a ceramic sheet 43, an active circuit board, a mounting steel plate 45 and a third connection cable 46 are disposed in the radome 41; the mounting steel plate 45 is fixedly mounted in the antenna housing 41, the ceramic plate 43 and the active circuit board are fixedly mounted on the mounting steel plate 45, the ceramic plate 43 and the active circuit board are connected and conducted through welding, one end of the third connecting cable 46 is fixedly welded and conducted with the active circuit board, and the other end of the third connecting cable 46 is fixedly welded and conducted with the third connector 42; the active circuit board is not shown in the figure.

In the combined antenna applied to the roadside unit according to the embodiment, the radome 41 has a mushroom-head shape; the height of the antenna housing 41 is 105mm-115mm, the diameter of the antenna housing 41 is 103mm-113mm, and the antenna housing 41 is made of ultraviolet-proof ABS;

the thickness of the installation steel plate 45 is 0.35mm-0.55mm, the diameter of the installation steel plate 45 is 86.5mm-90.7mm, and the installation steel plate 45 is made of a nickel-plated steel plate;

the length of the ceramic plate 43 is 8mm-35mm, the width of the ceramic plate 43 is 8mm-35mm, the thickness of the ceramic plate 43 is 2mm-8mm, and the dielectric constant of the ceramic plate 43 is 8mm-30 mm;

the outer diameter of the active circuit board is 53.3mm-77.5mm, the thickness of the active circuit board is 1.23mm-2.35mm, and the dielectric constant of the active circuit board is 4.0-5.0; the active circuit board is made of a PCB.

The components of the active antenna 4 are arranged according to the signal flow direction, from the input stage to the output stage, the current of each unit is relatively concentrated, the amplifier is used as the center for layout, the connecting line of high-frequency components is shortened, the distribution parameters of the high-frequency components and the electromagnetic interference between the high-frequency components are reduced, for adjustable components, the components which are easy to interfere cannot be too close to each other, the input and output components are far away as possible, and the components which are positioned at the edge of the active circuit board are more than 2mm away from the edge of the active circuit board; the symmetrical circuits are adopted, so that the distribution parameters of the components are consistent, the two amplifying devices are vertically arranged and far away from each other to reduce mutual coupling, and the components are uniformly, tidily and compactly arranged and have consistent density; the third joint 42 of the GPS/beidou active antenna 4 is a specially-made N-shaped male-head pin lengthened joint, the top of the third joint 42 is fixedly installed in the antenna housing 41, the top feed of the third joint 42 is fixedly welded and conducted with a third power cable, and the bottom of the third joint 42 is fixedly installed at a position corresponding to the transceiver device 1.

As shown in fig. 12 to 28, the sample of this embodiment is improved and perfected for many times, and finally verified by the detection of the instrument, involving the WLAN and WIFI frequency bands (2400MHz-2500MHz/5150MHz-5850MHz), the 2G, 3G, 4G and 5G frequency bands (698MHz-960MHz/1710MHz-4900MHz) and the GPS/beidou frequency band (1559MHz-1580MHz), and in the matching test of the antenna and the transceiver device 1, the standing-wave ratios are respectively below 2.0 and 1.50, and in the test of the signal intensity of the GPS/beidou active antenna 4, the signal intensity coefficient reaches about 43-44; in the test of the antenna directional diagram, the gain of 2400MHz-2500MHz reaches 5.5dBi, the gain of 5150MHz-5850MHz reaches 6dBi, the gain of 698MHz-960MHz reaches 2dBi, the gain of 1710MHz-4900MHz reaches 3dBi, and the non-roundness of the horizontal plane directional diagram is within +/-1 dB.

The combined antenna applied to the road side unit is simple in structure, small in size, convenient to install, low in cost, simple to produce and manufacture, easy to produce in scale, capable of achieving one-step operation only through one-person operation during production and welding, high in welding operation efficiency, capable of greatly improving production efficiency, capable of improving product quality and capable of meeting requirements of low cost and high performance of equipment operators.

It should be finally noted that the above embodiments are only intended to illustrate the technical solutions of the present invention, and not to limit the scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present invention can be modified or replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention.

Claims (10)

1. The utility model provides an use combination antenna at road side unit which characterized in that: the broadband high-gain dual-band antenna comprises transceiver equipment (1), a broadband high-gain dual-band antenna (2), a broadband omnidirectional antenna (3) and an active antenna (4);

the broadband high-gain dual-frequency antenna (2), the broadband omnidirectional antenna (3) and the active antenna (4) are respectively arranged on the transceiver equipment (1);

a first PCB (21) and a first connecting cable (295) are arranged in the broadband high-gain dual-frequency antenna (2); the first PCB (21) is provided with a 2.4GHz radiation array unit, a 5GHz radiation array unit and a combiner; the first connecting cable (295) is respectively connected with the 2.4GHz radiation array unit and the 5GHz radiation array unit through a combiner;

a second PCB (31) and a second connecting cable (395) are arranged in the broadband omnidirectional antenna (3); the second PCB (31) is provided with a first radiation oscillator (34) and a coupling oscillator (35); the second connecting cable (395) is connected with the first radiating oscillator (34) for feeding; the second connecting cable (395) is coupled with the coupling oscillator (35) for feeding.

2. The combined antenna applied to the road side unit according to claim 1, wherein: the 5GHz radiation array unit comprises a first 5GHz radiation array unit (221) arranged on the top of the front surface of the first PCB (21) and a second 5GHz radiation array unit (222) arranged on the top of the back surface of the first PCB (21); the 2.4GHz radiation array unit comprises a first 2.4GHz radiation array unit (231) arranged at the bottom of the front surface of the first PCB (21) and a second 2.4GHz radiation array unit (232) arranged at the bottom of the back surface of the first PCB (21);

the combiner comprises a frequency division integrated circuit (241) arranged on the front surface of the first PCB (21) and a grounding sheet (242) arranged on the back surface of the first PCB (21); the second 5GHz radiation array unit (222) and the second 2.4GHz radiation array unit (232) are respectively connected with a grounding sheet (242); the frequency division and integration circuit (241) is provided with a first output section (251) and a second output section (252); the first 5GHz radiation array unit (221) and the first 2.4GHz radiation array unit (231) are respectively connected with the first output section (251) and the second output section (252);

the core layer of the first connecting cable (295) is connected with the frequency division integrated circuit (241); the braid of the first connecting cable (295) is connected to the ground strip (242).

3. A combined antenna for use in a road side unit according to claim 2, wherein: the crossover-in-one line (241) includes a first feed port (253); the first output section (251) and the second output section (252) are respectively arranged at two ends of a first feeding port (253); a high-frequency feed network is arranged between the first output section (251) and the first 5GHz radiation array unit (221); a low-frequency feed network is arranged between the second output section (252) and the first 2.4GHz radiation array unit (231); the first feed port (253) is connected with a core layer of the connecting cable.

4. A combined antenna for use in a road side unit according to claim 3, wherein: the high frequency feed network comprises a high frequency connection line (26) connected to a first output section (251); a first open-circuit branch (261) and a second open-circuit branch (262) are arranged on one side of the high-frequency connecting wire (26); a third open branch (263) and a fourth open branch (264) are arranged on the other side of the high-frequency connecting line (26); the high-frequency connecting wire (26) is provided with a first impedance matcher (265) at the joint of the first open-circuit branch (261) and the third open-circuit branch (263); a second impedance matcher (266) is arranged on the third opening branch (263); a third impedance matcher (267) is arranged at the connection position of the high-frequency connecting wire (26) and the second open-circuit branch (262); a fourth impedance matcher (268) is arranged between the high-frequency connecting wire (26) and the first 5GHz radiation array unit (221);

the direction of the first open-circuit branch (261) is opposite to the direction of the second open-circuit branch (262); the direction of the third open branch (263) is opposite to the direction of the fourth open branch (264); the direction of the first open-circuit branch (261) is the same as the direction of the third open-circuit branch (263);

the low frequency feed network comprises a low frequency connection line (27) connected to a second output section (252); a fifth open-circuit branch (271), a sixth open-circuit branch (272) and a seventh open-circuit branch (273) are arranged on one side of the low-frequency connecting line (27); an eighth open-circuit branch (274) is arranged on one side of the low-frequency connecting line (27); a bending section (28) is arranged between the sixth open-circuit branch (272) and the eighth open-circuit branch (274) of the low-frequency connecting line (27); the direction of the fifth open-circuit branch (271) is opposite to the direction of the sixth open-circuit branch (272); the direction of the sixth open-circuit branch (272) is the same as the direction of the eighth open-circuit branch (274).

5. A combined antenna for use in a road side unit according to claim 2, wherein: the first 5GHz radiation array unit (221) comprises a plurality of 5GHz radiation oscillators (223); a first microstrip transmission line (224) is arranged between the first output section (251) and the 5GHz radiation oscillator (223); a first microstrip transmission line (224) and a high-frequency impedance transformation line (225) are arranged between two adjacent 5GHz radiation oscillators (223);

the first 2.4GHz radiating array unit (231) comprises a plurality of 2.4GHz radiating oscillators (233); a second microstrip transmission line (235) is arranged between the second output section (252) and the 2.4GHz radiation oscillator (233); a second microstrip transmission line (235) and a low-frequency impedance transformation line (234) are arranged between two adjacent 2.4GHz radiation oscillators (233);

a perforation (243) is arranged between the frequency division integrated circuit (241) and the grounding sheet (242); the braid of the first connecting cable (295) is connected with perforations (243);

the first 5GHz radiation array unit (221) and the second 5GHz radiation array unit (222) are symmetrical half-wave 5GHz radiation oscillators (223); the first 2.4GHz radiation array unit (231) and the second 2.4GHz radiation array unit (232) are symmetrical half-wave 2.4GHz radiation oscillators (233);

the lengths of the 5GHz radiation oscillator (223) and the 2.4GHz radiation oscillator (233) are both quarter wavelengths;

the length of the first PCB (21) is 375mm-397mm, the width of the first PCB (21) is 13.2mm-15.2mm, and the thickness of the first PCB (21) is 0.80mm-1.20 mm;

the first PCB (21) is made of an F4BM-2 double-sided copper-clad plate; the dielectric constant of the first PCB (21) is 1-4;

the first connecting cable (295) is a 50 ohm tinned cable; the outer diameter of the core wire of the first connecting cable (295) is 0.3mm-0.7mm, the outer diameter of the medium of the first connecting cable (295) is 1.6mm-2.0mm, and the outer diameter of the shielding layer of the first connecting cable (295) is 2.0mm-2.5 mm;

the grounding piece (242) is in a convex shape, the length of the grounding piece (242) is 62.3mm-70.5mm, and the width of the grounding piece (242) is 13.4mm-15.7 mm;

the broadband high-gain dual-frequency antenna (2) further comprises a first glass fiber reinforced plastic cap (291), a first glass fiber reinforced plastic outer cover (292), a first aluminum sleeve (293) and a first connector (294); the first joint (294) and the first glass fiber reinforced plastic cap (291) are respectively arranged at two ends of the first glass fiber reinforced plastic outer cover (292); the first aluminum sleeve (293) is arranged between the first joint (294) and the first glass fiber reinforced plastic outer cover (292); the first PCB (21) and the first connecting cable (295) are arranged in the first glass fiber reinforced plastic outer cover (292); the first connecting cable (295) is connected to a first connector (294).

6. The combined antenna applied to the road side unit according to claim 1, wherein: the second PCB (31) is also provided with a second feed port (32), a grounding wire (33) and a bent microstrip line (36);

the core layer of the second connection cable (395) is connected with a second feed port (32); the braid of the second connection cable (395) is connected to a ground wire (33); one end of the coupling oscillator (35) is connected with a grounding wire (33); the other end of the coupling oscillator (35) is connected with the bent microstrip line (36); the coupling oscillator (35) is coupled with the feed port for feeding; the first radiating element (34) is connected to the feed port.

7. The combined antenna applied to the road side unit according to claim 6, wherein: the first radiating vibrator (34) is arranged on the top of the second PCB (31); the bent microstrip line (36) is arranged at the bottom of the second PCB (31); the coupling vibrators (35) are arranged on two sides of the second feed port (32) and two sides of the grounding wire (33); the coupling oscillator (35) is arranged between the first radiation oscillator (34) and the bent microstrip line (36);

a gradient microstrip line (37) is arranged between the coupling oscillator (35) and the second feed port (32); the coupling vibrators (35) are arranged on two sides of the gradient microstrip line (37);

the coupling element (35) includes a first coupling portion (351) and a second coupling portion (352); the width of the second coupling part (352) is greater than that of the first coupling part (351); the first coupling part (351) is connected with a grounding wire (33); the second coupling part (352) is connected with the bent microstrip line (36);

the first radiating element (34) includes a first radiating section (341) and a second radiating section (342); the first radiation part (341) is arranged on the top of the second radiation part (342); one side of the second radiation part (342) is inwards sunken to form an inwards concave arc surface (381); a tapered opening (382) is arranged between the second radiation part (342) and the gradient microstrip line (37);

the first radiation part (341) is composed of a semicircular radiator at the top and a rectangular radiator at the bottom.

8. The combined antenna applied to the road side unit according to claim 7, wherein: the second PCB (31) is made of an FR4 single-sided copper-clad plate;

the length of the second PCB (31) is 105mm-120mm, the width of the second PCB (31) is 13.2mm-14.2mm, the thickness of the second PCB (31) is 0.40mm-0.80mm, and the dielectric constant of the second PCB (31) is 4.0-5.0;

the length of the first radiating element (34) is a quarter wavelength;

the second connecting cable (395) is a 50 ohm tinned cable; the outer diameter of the core wire of the second connecting cable (395) is 0.3mm-0.7mm, the outer diameter of the medium of the second connecting cable (395) is 1.6mm-2.0mm, and the outer diameter of the shielding layer of the second connecting cable (395) is 2.0mm-2.5 mm;

the broadband omnidirectional antenna (3) further comprises a second glass fiber reinforced plastic cap (391), a second glass fiber reinforced plastic outer cover (392), a second aluminum sleeve (393) and a second joint (394); the second joint (394) and the second glass fiber reinforced plastic cap (391) are respectively arranged at two ends of the second glass fiber reinforced plastic outer cover (392); the second aluminum sleeve (393) is arranged between the second joint (394) and the second glass fiber reinforced plastic outer cover (392); the second PCB (31) and the second connecting cable (395) are arranged in the second glass fiber reinforced plastic outer cover (392); the second connection cable (395) is connected to a second connector (394).

9. The combined antenna applied to the road side unit according to claim 1, wherein: the active antenna (4) comprises an antenna housing (41) and a third joint (42) connected with the antenna housing (41), wherein a ceramic plate (43), an active circuit board, an installation steel plate (45) and a third connecting cable (46) are arranged in the antenna housing (41); installation steel sheet (45) erection fixation is in antenna house (41), ceramic wafer (43) and active circuit board erection fixation are on installation steel sheet (45), ceramic wafer (43) and active circuit board switch on through welded connection, the one end and the active circuit board welded fastening of third connecting cable (46) switch on, the other end and the third of third connecting cable (46) connect (42) welded fastening of third and switch on.

10. A combined antenna for use in a road side unit according to claim 9, wherein: the antenna housing (41) is shaped like a mushroom head; the height of the antenna housing (41) is 105-115 mm, the diameter of the antenna housing (41) is 103-113 mm, and the antenna housing (41) is made of ultraviolet-proof ABS;

the thickness of the installation steel plate (45) is 0.35mm-0.55mm, the diameter of the installation steel plate (45) is 86.5mm-90.7mm, and the installation steel plate (45) is made of a nickel-plated steel plate;

the length of the ceramic plate (43) is 8-35 mm, the width of the ceramic plate (43) is 8-35 mm, the thickness of the ceramic plate (43) is 2-8 mm, and the dielectric constant of the ceramic plate (43) is 8-30 mm;

the outer diameter of the active circuit board is 53.3mm-77.5mm, the thickness of the active circuit board is 1.23mm-2.35mm, and the dielectric constant of the active circuit board is 4.0-5.0; the active circuit board is made of a PCB.

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