CN217983632U - Miniaturized narrow strip-shaped flexible ultra-wideband antenna for full-screen watch and watch shell - Google Patents
Miniaturized narrow strip-shaped flexible ultra-wideband antenna for full-screen watch and watch shell Download PDFInfo
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Abstract
The utility model discloses a miniaturized narrow strip-shaped flexible ultra wide band antenna and watch shell for full-screen watch, the antenna comprises a radiation piece, a dielectric plate, a coplanar ground and a coplanar microstrip line, the radiation piece, the dielectric plate and the coplanar microstrip line are all printed on one surface of the dielectric plate, and a coplanar gap is arranged between the coplanar microstrip line and the coplanar ground; the short-circuit branch knot connects the radiation sheet and the coplanar ground together, and the width of the radiation sheet is the same as that of the coplanar ground; the dielectric plate is a flexible dielectric plate, and the coplanar ground surrounds the side face of the coplanar microstrip line. The radiating sheet, the dielectric plate and the coplanar microstrip line are printed on one surface of the dielectric plate, the antenna is miniaturized, is suitable for being used as a built-in antenna and is attached to the inner wall of a shell of a product, the width of the antenna radiating sheet is the same as that of the coplanar ground, the width of the antenna is greatly reduced, and the antenna is narrowed; the short circuit branch links the radiation sheet and the coplanar ground together, reduces the antenna length, and is very suitable for being used in the full-screen watch product of ultra wide band location.
Description
Technical Field
The utility model belongs to the technical field of relate to ultra wide band antenna, concretely relates to flexible ultra wide band antenna of miniaturized narrow strip shape and watch case body for full-screen wrist-watch.
Background
The global four-major satellite navigation system can carry out accurate positioning in outdoor open environment, but basically loses positioning capability in indoor environment shielded by buildings. People are active indoors for about 80% of the time, and therefore, an indoor positioning and navigation service has a wide demand. UWB (ultra wide band) is an emerging indoor positioning technology in recent years, and the system utilizes ultra wide band pulse signals to carry out information transmission, and has congenital advantages in the aspects of multipath resistance, low complexity, time synchronization and the like. Ultra Wide Band (UWB) is a new type of short-range high-rate wireless communication technology, and the specified relative bandwidth is greater than 20% or the absolute bandwidth is greater than 500MHz.
Indoor positioning usually includes personnel positioning and material positioning, and a positioning base station is generally large in size, so that there is no strict requirement on the size of a positioning antenna used, but the size of a positioning tag used for a terminal is usually not so large. The material location label is relatively personnel to wear the label and is usually of a large size, built-in antenna available space is also more, there is not special requirement to the antenna size, but general size can not be too big to personnel location label (for example worker's card formula location label, safety helmet location label, wrist strap location label, full screen wrist-watch location label etc.), also there is the requirement to built-in antenna size like this, especially full screen wrist-watch location label, because the full screen exists, the available inside headroom of antenna is just littleer, just so need an antenna that can satisfy the small-size requirement still need guarantee that the ultra wide band bandwidth is 500MHz at least.
The built-in antenna mainly comprises a ceramic antenna, a PCB antenna, a flexible antenna (FPC antenna) and an LDS antenna; the ceramic antenna and the PCB antenna are large in size and are not suitable for full-screen watch label equipment, the LDS antenna has the greatest advantage of space saving and is suitable for full-screen watch label equipment, but the ultra-wideband antenna requires the bandwidth to be larger than 500MHz, the LDS antenna is not easy to realize, especially the LDS antenna is high in design and processing cost and is not suitable for equipment which is not large in batch. The flexible antenna has the advantages that the cost is low, the ultra-wideband bandwidth is easy to realize, the antenna is directly attached to the inner wall of the shell, and the inner space of a product is saved.
In chinese patent document CN 212571344U, a wearable flexible ultra-wideband dual-notch antenna is disclosed, which includes a metal radiation patch, a metal radiation floor, and a single-layer dielectric substrate. The metal radiation patch and the radiation floor are both positioned on the upper surface of the single-layer dielectric substrate. The metal radiation patch is composed of cat-shaped radiation metal and an inverted L-shaped elliptical corner cut branch, and the length of the inverted L-shaped elliptical corner cut branch is one quarter of the wavelength corresponding to the central frequency of the corresponding WLAN frequency band. The radiant floor is composed of a pair of large rectangles, a pair of small rectangles and U-shaped grooves with openings towards two sides. The radiant floor is composed of a pair of large rectangles, a pair of small rectangles and U-shaped grooves with openings towards two sides. The medium substrate uses flexible material felt.
It should be noted that the antenna operates in the UWB band (3.1 GHz to 10.6 GHz), the dielectric plate is made of flexible material felt, and the size of the dielectric plate is 45mm × 31.5mm × 2mm. The lower the working frequency of the antenna, the larger the antenna size is, so that the antenna coverage frequency is low, and the antenna size is difficult to be small; the use of felt media, both in antenna size and with media, is a completely unusable watch end product for full screen.
Further, chinese patent document CN 11469697A discloses a UWB antenna and a wearable device, in which the operating frequency band of the antenna is 3.07-10.8GHz, which meets the requirement of the operating frequency band, but the size of the antenna dielectric plate is 24mm × 25.5mm × 0.4mm, although the length of the antenna meets the requirement, the width of the antenna is wide, and the length of the inside of the case of a full-screen watch terminal product is 40.3mm, and the length of the full-screen watch screen is 33mm, so the screen cannot cover the antenna, and thus the size of the antenna is also not applicable to the full-screen watch terminal product.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide an antenna is narrow, miniaturized, be fit for built-in miniaturized narrow strip shape flexible ultra wide band antenna that is used for full-screen wrist-watch.
In order to solve the technical problem, the utility model adopts the technical scheme that the miniaturized narrow strip-shaped flexible ultra-wideband antenna for the full-screen watch comprises a radiation piece, a dielectric plate, a coplanar ground and a coplanar microstrip line, wherein the radiation piece, the dielectric plate and the coplanar microstrip line are all printed on one surface of the dielectric plate, and a coplanar gap is arranged between the coplanar microstrip line and the coplanar ground; the short-circuit branch knot connects the radiation sheet and the coplanar ground together, and the width of the radiation sheet is the same as that of the coplanar ground; the dielectric plate is a flexible dielectric plate, and the coplanar ground surrounds the side face of the coplanar microstrip line.
The radiating sheet, the dielectric plate and the coplanar microstrip line are printed on one surface of the dielectric plate, the antenna is miniaturized and suitable for being used as a built-in antenna and attached to the inner wall of a product shell, the width of the antenna radiating sheet is the same as that of the coplanar ground, the width of the antenna is greatly reduced, and the antenna is narrowed; the short circuit branch links the radiation sheet and the coplanar, reduces the length of the antenna, and is very suitable for being used in a full-screen watch product with ultra-wide band positioning.
Preferably, the coplanar ground is in a U shape and surrounds three sides of the coplanar microstrip line; the dielectric plate is a polyimide flexible dielectric plate.
The coplanar ground is U-shaped, so that the length of the antenna is reduced; the dielectric plate is a polyimide flexible dielectric plate, and the polyimide is an FPC flexible plate material, can be attached to the inner wall of the shell, reduces the space and is suitable for miniaturization.
Preferably, the radiation sheet is provided with a first U-shaped groove and a second U-shaped groove; and a double-sided adhesive tape is arranged on the other side of the medium plate.
The radiating sheet adopts a U-shaped groove structure, and is in U-shaped fit with the coplanar ground, so that the length of the antenna is reduced; the double faced adhesive tape is convenient for the antenna to be tightly attached to the inner wall of the shell.
Preferably, the coplanar gap has three parts, namely a gap I, a gap II and a gap III;
the coplanar microstrip line comprises a first microstrip line, a second microstrip line and a third microstrip line; the coplanar microstrip line is trapezoidal, one microstrip line is connected with a coaxial line inner conductor, and the other microstrip line is connected with the radiating fin;
the coplanar ground consists of a coplanar ground I part and a coplanar ground II part; the coplanar ground one and the coplanar ground two are connected to each other, and the lower common portion of the interconnection is connected to the coaxial line outer conductor.
The three parts of the coplanar slot are matched with the three parts of the coplanar microstrip line, so that the coplanar slot can surround three sides of the coplanar microstrip line; the coplanar microstrip line is trapezoidal, so that the bandwidth of the antenna is increased;
preferably, the total thickness of the antenna is not more than 0.1mm; the three parts of the coplanar ground, the coplanar microstrip line and the coplanar slot perform characteristic impedance conversion from 50 omega to 100 omega; the diameter of the coaxial line inner conductor and the coaxial line outer conductor is 0.81mm, and the connecting end is an IPEX4 generation joint.
The total thickness of the antenna is not more than 0.1mm, which shows that the antenna of the utility model is a miniaturized narrow strip-shaped flexible ultra-wideband antenna; the dielectric plate is a polyimide flexible dielectric plate, which is convenient for FPC board processing and antenna bandwidth control, and the antenna performance is difficult to ensure if the two surfaces of the plate antenna with the thickness of 0.1mm are designed.
The utility model discloses another problem that solves provides a watch case body for full screen wrist-watch, adopts the utility model discloses aforementioned flexible ultra wide band antenna of miniaturized narrow strip shape, including wrist-watch epitheca and wrist-watch screen, the dress is pasted to flexible ultra wide band antenna of miniaturized narrow strip shape the wrist-watch epitheca inner wall top staggers and the quadrature with bluetooth ceramic antenna, with the wrist-watch screen parallel of staggering.
Preferably, the width of the inner part of the watch upper shell is 32.4mm, and the length of the inner part of the watch upper shell is 40.3mm; the width of the watch screen is 30mm, and the length of the watch screen is 33mm.
Preferably, the length of the radiating patch and the coplanar ground are both L, then:
wherein l 1 Is a U-shaped groove with a length of l 2 Is U-shaped groove two long, lambda e Is the effective wavelength, f is the center frequency, ε r The relative dielectric constant of the watch shell to which the miniaturized narrow strip-shaped flexible ultra-wideband antenna is attached.
Preferably, the impedance bandwidth of the miniaturized narrow strip-shaped flexible ultra-wideband antenna S11 is less than or equal to-10 dB and is 3.42GHz-4.76GHz.
Preferably, the center frequency of the miniaturized narrow strip-shaped flexible ultra-wideband antenna is 4GHz; width of 5mm,0.0667 wavelength; the length is 24.5mm,0.326 wavelength.
Radiation piece, dielectric-slab and coplane microstrip line all print built-in antenna is fit for being done to a face of dielectric-slab, pastes in product watch shell inner wall, and antenna radiation piece is the same with coplane ground width, reduces antenna width greatly, adopts U type groove and short circuit branch and festival, reduces antenna length, and coplane microstrip line adopts trapezoidal increase antenna bandwidth, consequently the utility model discloses a flexible ultra wide band antenna of miniaturized narrow strip shape is fit for being used in the wrist-watch product of ultra wide band location very much.
Drawings
The following detailed description is made with reference to the accompanying drawings and embodiments of the present invention:
fig. 1 is a structure diagram of a strip-shaped flexible ultra-wideband antenna;
FIG. 2 is a structural diagram of the miniaturized strip-shaped flexible ultra-wideband antenna of the present invention;
fig. 3 is a schematic view of the miniaturized narrow strip-shaped flexible ultra-wideband antenna S11 of the present invention;
FIG. 4 is the H-plane directional diagram of the miniaturized narrow strip-shaped flexible ultra-wideband antenna of the present invention at 4GHz;
FIG. 5 is the E face directional diagram of the miniaturized narrow strip-shaped flexible ultra-wideband antenna of the present invention at 4GHz;
fig. 6 is a back structure view of the watch case for a full screen watch of the present invention;
fig. 7 is a front view of the watch case for a full screen watch of the present invention;
wherein: 1-a handset housing; 2-miniaturized narrow strip-shaped flexible ultra-wideband antenna, 201-radiating sheet, 2011-U-shaped groove I, 2012-U-shaped groove II, 202-dielectric plate, 203-coplanar ground, 2031-coplanar ground I, 2032-coplanar ground II, 204-coplanar microstrip line, 2041-microstrip line I, 2042-microstrip line II, 2043-microstrip line III, 205-coplanar gap, 2051-gap I, 2052-gap II, 2053-gap III, 206-short-circuit branch, 207-coaxial line inner conductor and 208-coaxial line outer conductor; 3-watch screen; 4-Bluetooth ceramic antenna, 5-circuit board, 6-battery, 7-watch upper shell.
Detailed Description
Fig. 1 shows a narrow strip-shaped flexible ultra-wideband antenna, the size of the antenna is 30.5mm × 5mm × 0.1mm, although the width of the narrow strip-shaped flexible ultra-wideband antenna can meet the use requirement, the length of the narrow strip-shaped flexible ultra-wideband antenna still cannot meet the requirement of placing the ultra-wideband antenna and the bluetooth ceramic antenna 4 at the same time.
As shown in fig. 2, the present invention relates to a miniaturized narrow strip-shaped flexible ultra-wideband antenna 2 for a full-screen watch, which comprises a radiation sheet 201, a dielectric plate 202, a coplanar ground 203 and a coplanar microstrip line 204, wherein the radiation sheet 201, the dielectric plate 202 and the coplanar microstrip line 204 are all printed on one surface of the dielectric plate 202, and a coplanar gap 205 is formed between the coplanar microstrip line 204 and the coplanar ground 203; the short-circuit branch 206 connects the radiating patch 201 and the coplanar ground 203 together, and the width of the radiating patch 201 is the same as that of the coplanar ground 203; the dielectric plate 202 is a flexible dielectric plate, and the coplanar ground 203 surrounds the side surface of the coplanar microstrip line 204.
The coplanar ground 203 is in a U shape and surrounds three sides of the coplanar microstrip line 204; the dielectric plate 202 is a polyimide flexible dielectric plate.
The radiation sheet 201 is provided with a first U-shaped groove 2011 and a second U-shaped groove 2012, and compared with the situation that the first U-shaped groove 2011 and the second U-shaped groove 2012 are not added, the length of the antenna of the short circuit branch 206 can be reduced by 6mm; and a double-sided adhesive tape is arranged on the other side of the medium plate 202.
The coplanar slot 205 has three portions, slot one 2051, slot two 2052, and slot three 2053;
the coplanar microstrip line 204 comprises three parts, namely a microstrip line I2041, a microstrip line II 2042 and a microstrip line III 2043; the coplanar microstrip line 204 is trapezoidal, the first microstrip line 2041 is connected with a coaxial line inner conductor 207 (connected in a welding manner), and the third microstrip line 2043 is connected with the radiating patch 201;
the coplanar ground 203 consists of a first coplanar ground 2031 and a second coplanar ground 2032; the first coplanar ground 2031 and the second coplanar ground 2032 are connected to each other, and the lower common portion of the connection is connected to the coaxial outer conductor 208 (soldered connection).
The total thickness of the miniaturized narrow strip-shaped flexible ultra-wideband antenna 2 for the full-screen watch of the utility model is not more than 0.1mm; the three parts of the coplanar ground 203, the coplanar microstrip line 204 and the coplanar slot 205 perform characteristic impedance transformation from 50 omega to 100 omega; the wire diameter of the coaxial wire inner conductor 207 and the coaxial wire outer conductor 208 is 0.81mm, and the coaxial wire connecting end is an IPEX4 generation joint.
The utility model discloses a flexible ultra wide band antenna 2 long wide dimension 24.5mm x 5mm x 0.1mm of miniaturized narrow strip shape for full-screen watch adopts the impedance gradual change method to widen the 2 impedance bandwidth of the flexible ultra wide band antenna of miniaturized narrow strip shape that are used for full-screen watch, impedance bandwidth 3.42GHz-4.76GHz when being used for the flexible ultra wide band antenna 2S11 of miniaturized narrow strip shape of full-screen watch is less than or equal to-10 dB.
The watch case 1 for a full-screen watch of the present embodiment adopts the miniaturized narrow strip-shaped flexible ultra-wideband antenna 2 of the present embodiment, and includes a watch upper case 7 and a watch screen 3, where the miniaturized narrow strip-shaped flexible ultra-wideband antenna 2 is attached to the top end of the inner wall of the watch upper case 7, and is staggered and orthogonal to the bluetooth ceramic antenna, and is staggered and parallel to the watch screen, as shown in fig. 6 and 7.
Because the existence of bluetooth ceramic antenna 4, in order to reserve space for bluetooth ceramic antenna 4, miniaturized flexible ultra wide band antenna 2 of narrow shape needs further reduction in length, it has U type groove one 2011, U type groove two 2012 to open on radiation piece 201, cuts off the electric current flow direction, changes the electric current route, reduces the flexible ultra wide band antenna 2 frequency of miniaturized narrow shape to reduce the antenna size.
The inner width of the watch upper shell 7 is 32.4mm, and the length of the watch upper shell is 40.3mm; the watch screen 3 is 30mm wide and 33mm long. The lengths of the radiation sheet 201 and the coplanar ground 203 in the miniaturized narrow strip-shaped flexible ultra-wideband antenna 2 are both L, then:
wherein l 1 Is a long U-shaped groove 2 Is U-shaped groove two long, lambda e Is effective wavelength, f is center frequency, epsilon r The relative dielectric constant of the watch shell to which the miniaturized narrow strip-shaped flexible ultra-wideband antenna is attached.
The central frequency of the miniaturized narrow strip-shaped flexible ultra-wideband antenna is 4GHz; width of 5mm,0.0667 wavelength; the length is 24.5mm,0.326 wavelength.
Key parameters of the miniaturized narrow strip-shaped flexible ultra-wideband antenna 2 are mainly determined by preliminary calculation of free space wavelength corresponding to a low-frequency point of antenna operation; the length of the radiating sheet and the coplanar ground in the non-miniaturized narrow strip-shaped flexible ultra-wideband antenna are both about
Wherein c is the speed of light, λ e Is effective wavelength, f is center frequency, epsilon r The relative dielectric constant of the watch shell to which the miniaturized narrow strip-shaped flexible ultra-wideband antenna is attached.
In the miniaturized strip-shaped flexible ultra-wideband antenna 2 of the present embodiment, two U-shaped slot gaps (U-shaped slot one 2011 and U-shaped slot two 2012) are formed by adopting a miniaturization method to reduce the working frequency of the antenna, and the short-circuit branch 206 is adopted to compensate the capacitive reactance, so that the size of the antenna is reduced. The radiating patch 201 and the coplanar ground 203 are therefore both approximately L in length, i.e.
Wherein l 1 Is a U-shaped groove I2011 long I 2 Is U-shaped slot two 2012 long.
The center frequency of the miniaturized narrow strip-shaped flexible ultra-wideband antenna 2 for the full-screen watch is 4GHz, and the impedance bandwidth is 1GHz. The antenna was modeled using HFSS13.0 software, simulated and optimized, and the final dimensional parameters are shown in table 1.
TABLE 1 miniaturized narrow strip-shaped flexible ultra-wideband antenna key site size parameter
| Length/mm | Width/mm | Length/mm | Width/mm | ||
| Radiation slice (201) | 11.7 | 5 | Gap two (2052) | 85 | 0.25 |
| U-shaped groove I (2011) | 3.4 | 1 | Gap three (2053) | 1.2 | 0.4 |
| U type groove two (2012) | 29 | 1 | Microstrip line one (2041) | 11 | 1.5 |
| Coplanar ground (203) | 11.7 | 5 | Microstrip line three (2043) | 2 | 0.35 |
| Gap one (2051) | 15 | 015 | Short circuit branch (206) | 08 | 0.6 |
The length and width of the non-miniaturized narrow strip-shaped flexible ultra-wideband antenna is 30.5mm × 5mm × 0.1mm, the length and width of the miniaturized narrow strip-shaped flexible ultra-wideband antenna 2 for the full-screen watch of the embodiment is 24.5mm × 5mm × 0.1mm 1 Is a U-shaped groove I2011 with the length of 3.4mm 2 The length of the U-shaped slot two 2012 is 2.9mm, so the antenna size is verified to be in accordance with the formula (2) and the formula (3) by using software simulation optimization.
The S11 and the directional diagram of the miniaturized narrow strip-shaped flexible ultra-wideband antenna 2 for the full-screen watch refer to fig. 3-5, fig. 3 is the miniaturized narrow strip-shaped flexible ultra-wideband antenna 2S11, the impedance bandwidth is 3.42GHz-4.76GHz when S11 is smaller than-10 dB, fig. 4 is the main polarization and cross polarization directional diagram of Theta =90 ° H-plane when S11 is smaller than 4GHz, the out-of-roundness of the main polarization component is smaller than 0.9dB, and the cross polarization component is smaller than-20.9 dB; fig. 5 shows the main polarization and cross polarization patterns of the E-plane Phi =0 ° and Phi =90 ° at 4GHz of the miniaturized strip-shaped flexible ultra-wideband antenna 2, which is seen to be a lying "8" shape, the main polarization pattern at Phi =0 ° and the main polarization pattern at Phi =90 ° are substantially coincident except for the top and bottom null points, the cross polarization is less than-31 dB at Phi =0 °, the cross polarization is less than-15 dB at Phi =90 °, and the cross polarization differs by 16dB at Phi =0 ° and Phi =90 °, which is caused by the addition of the short-circuit stub 206 to the miniaturized strip-shaped flexible ultra-wideband antenna 2. Table 2 shows the maximum gains of the miniaturized narrow strip-shaped flexible ultra-wideband antenna 2 at different frequency points, and it is seen from table 2 that the maximum gains of the antenna at different frequency points are all greater than 1dB, and the higher the frequency is, the larger the gain is, because the longer the effective electrical length of the antenna is when the frequency is higher.
TABLE 2 miniaturized narrow strip-shaped flexible ultra-wideband antenna 2 frequency points maximum gain
The above results show that the miniaturized strip-shaped flexible ultra-wideband antenna 2 for full-screen watch of the present embodiment is omnidirectional radiation, the impedance bandwidth is greater than 1GHz, the maximum gains of different frequency points are all greater than 1dB, and the size of the antenna is 24.5mm × 5mm × 0.1mm (as compared with the maximum size 45mm × 31.5mm × 2mm and the area 1417.5mm in chinese patent document CN 212571344U, the maximum size 45mm × 2mm and the area 1417.5mm 2 In comparison, the difference in area is 1295, and the antenna in CN 212571344U uses felt media, and the antenna size and the used media are both completely unusable for full-screen watch terminal products), so the antenna performance and size both meet the use requirements.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only illustrative of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the present invention, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. A miniaturized narrow strip-shaped flexible ultra-wideband antenna for a full-screen watch comprises a radiation piece, a dielectric plate, a coplanar ground and a coplanar microstrip line, and is characterized in that the radiation piece, the dielectric plate and the coplanar microstrip line are all printed on one surface of the dielectric plate, and a coplanar gap is formed between the coplanar microstrip line and the coplanar ground; the short circuit branch links the radiation sheet and the coplanar ground, and the width of the radiation sheet is the same as that of the coplanar ground; the dielectric plate is a flexible dielectric plate, and the coplanar ground surrounds the side face of the coplanar microstrip line.
2. The miniaturized strip-shaped flexible ultra-wideband antenna for full-screen watches according to claim 1, characterized in that the coplanar ground is a U-shape, enclosing on three sides the coplanar microstrip line; the dielectric plate is a polyimide flexible dielectric plate.
3. The miniaturized strip-shaped flexible ultra-wideband antenna for a full-screen watch of claim 2, wherein the radiating strip is provided with a first U-shaped groove and a second U-shaped groove; and a double-sided adhesive tape is arranged on the other side of the medium plate.
4. A miniaturized strip-shaped flexible ultra-wideband antenna for a full-screen watch according to claim 3, characterized in that said coplanar slot has three parts, slot one, slot two and slot three;
the coplanar microstrip line comprises a first microstrip line, a second microstrip line and a third microstrip line; the coplanar microstrip line is trapezoidal, one microstrip line is connected with a coaxial line inner conductor, and the other microstrip line is connected with the radiating fin;
the coplanar ground consists of a coplanar ground I part and a coplanar ground II part; the first coplanar ground and the second coplanar ground are connected to each other, and both the first coplanar ground and the second coplanar ground are connected to the coaxial line outer conductor.
5. A miniaturized strip-shaped flexible ultra-wideband antenna for a full-screen watch as claimed in claim 4, characterized in that the total thickness of the antenna does not exceed 0.1mm; the three parts of the coplanar ground, the coplanar microstrip line and the coplanar slot perform characteristic impedance transformation from 50 omega to 100 omega; the diameter of the coaxial line inner conductor and the coaxial line outer conductor is 0.81mm, and the coaxial line connecting end is an IPEX4 generation joint.
6. A watch case for a full screen watch, incorporating a miniaturized strip-shaped flexible ultra-wideband antenna according to any of claims 3 to 5, comprising a watch upper case and a watch screen, characterized in that said miniaturized strip-shaped flexible ultra-wideband antenna is mounted on the top of the inner wall of said watch upper case, offset and orthogonal to the bluetooth ceramic antenna, offset parallel to said watch screen.
7. The watch case for a full screen watch according to claim 6, characterised in that said watch top case is internally 32.4mm wide and 40.3mm long; the width of the watch screen is 30mm, and the length of the watch screen is 33mm.
8. The watch case for a full screen watch according to claim 6, characterised in that said miniaturized strip-shaped flexible ultra wide band antenna has a central frequency of 4GHz; the width is 5mm, and the wavelength is 0.0667; the length is 24.5mm,0.326 wavelength.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222400252.6U CN217983632U (en) | 2022-09-09 | 2022-09-09 | Miniaturized narrow strip-shaped flexible ultra-wideband antenna for full-screen watch and watch shell |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222400252.6U CN217983632U (en) | 2022-09-09 | 2022-09-09 | Miniaturized narrow strip-shaped flexible ultra-wideband antenna for full-screen watch and watch shell |
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| CN217983632U true CN217983632U (en) | 2022-12-06 |
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| CN202222400252.6U Active CN217983632U (en) | 2022-09-09 | 2022-09-09 | Miniaturized narrow strip-shaped flexible ultra-wideband antenna for full-screen watch and watch shell |
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