CN217544933U - Ultra-wideband antenna - Google Patents
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- CN217544933U CN217544933U CN202221067491.8U CN202221067491U CN217544933U CN 217544933 U CN217544933 U CN 217544933U CN 202221067491 U CN202221067491 U CN 202221067491U CN 217544933 U CN217544933 U CN 217544933U
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Abstract
The embodiment of the utility model provides an ultra wide band antenna relates to antenna technical field, for adaptation 10.525 GHz's microwave radar chip, can be in the work of the narrowband operating system of relative high frequency department. The antenna comprises a cuboid-shaped dielectric substrate, wherein a patch antenna is laid on the upper part of the front surface of the dielectric substrate, and a rectangular ground plate is laid on the lower part of the back surface of the dielectric substrate; the patch antenna is elliptical or circular, the center of the patch antenna is provided with a central hollow, the lower part of the front surface of the dielectric substrate is provided with a feeder line, the feeder line is a long strip-shaped metal sheet, one end of the feeder line is connected with the patch antenna, and the other end of the feeder line is superposed with the edge of the side surface of the lower part of the dielectric substrate; an inverted U-shaped groove is formed at the joint of the patch antenna and the feeder line, the arc end of the inverted U-shaped groove is positioned on the patch antenna, and the end opposite to the arc end is positioned on the feeder line; the thickness of the dielectric substrate is less than or equal to 2 mm, and the dielectric constant is 2.2; the material of patch antenna includes the copper, and the rectangle ground plate material includes the copper. The utility model is used for the communication field.
Description
Technical Field
The utility model relates to the technical field of antennas, especially, relate to an ultra wide band antenna.
Background
With the rapid development of wireless communication, the requirements of communication equipment on antennas are higher and higher, and the characteristics of miniaturization, ultra wide band and excellent radiation characteristic become indispensable characteristics of the antennas. Ultra-wideband antennas have begun to be the subject of much research since the release of ultra-wideband antennas by the federal communications commission in the united states. The Ultra Wide Band antenna is called UWB (Ultra Wide Band, UWB) antenna for short, the antenna occupies the bandwidth above 500MHz in the frequency Band of 3.1-10.6GHz, the frequency Band is divided in 3.1-10.6GHz. The working in UWB frequency band includes many narrow-band working systems, wireless local area network WLAN (2.4-2.484 GHz, 5.15-5.825 GHz), satellite X wave band (7.25-7.75 GHz) and International Telecommunication Union (ITU) wave band (8.01-8.5 GHz).
There is a prior art compact printed monopole UWB antenna having a bandwidth of approximately 7.91GHz. Within the UWB operating band, wireless local area network WLANs (2.4-2.484 GHz, 5.15-5.825 GHz), satellite X-band (7.25-7.75 GHz) and International Telecommunication Union (ITU) band (8.01-8.5 GHz), narrowband systems and UWB antennas can interfere with each other.
In the prior art, a miniaturized four-notch ultra-wideband antenna is provided, which realizes the four-notch UWB characteristic, has good omnidirectional radiation characteristic and outstanding gain effect, and can effectively inhibit mutual interference between a narrow-band working system and a UWB system. However, the highest notch frequency band of the antenna is 8-8.54GHz, and the notch at a relatively high frequency cannot be realized.
In short, the notch frequency of the UWB antenna in the prior art is mostly below 9GHz, and the UWB antenna cannot be adapted to a microwave radar chip of 10.525GHz and cannot operate in a narrow-band operating system at a relatively high frequency.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides an ultra wide band antenna, for adaptation 10.525 GHz's microwave radar chip, can work at the narrowband operating system of relative high frequency department.
An ultra-wideband antenna, comprising: the antenna comprises a rectangular dielectric substrate, a patch antenna is arranged on the upper part of the front surface of the dielectric substrate, a rectangular grounding plate is arranged on the lower part of the back surface of the dielectric substrate, and the length of the rectangular grounding plate is the same as the width of the dielectric substrate; the patch antenna is elliptical or circular, a central hollow is arranged in the center of the patch antenna, the shape of the central hollow is similar to a convex shape, and the protruding part of the similar convex shape is in the shape of an arc; a feeder line is arranged at the lower part of the front surface of the dielectric substrate, the feeder line is a long strip-shaped metal sheet, one end of the feeder line is connected with the patch antenna, and the other end of the feeder line is superposed with the edge of the side surface of the lower part of the dielectric substrate; an inverted U-shaped groove is formed in the joint of the patch antenna and the feeder line, the arc end of the inverted U-shaped groove is located on the patch antenna, and the end, opposite to the arc end, of the inverted U-shaped groove is located on the feeder line; the thickness of the dielectric substrate is less than or equal to 2 mm, and the dielectric constant is 2.2; the patch antenna is made of copper and silver, and the rectangular grounding plate is made of copper and silver.
Wherein, the ultra wide band antenna still includes: the U-shaped groove is located on the patch antenna and located between the central hollow portion and the inverted U-shaped groove, and the central hollow portion is surrounded by the U-shaped groove.
Preferably, the ultra-wideband antenna further comprises: c-type branches and reverse C-type branches; the C-shaped branches and the reverse C-shaped branches are located on two sides of the feeder line and are arranged asymmetrically and in a staggered mode.
The height of the inverted U-shaped groove is smaller than 9.1 mm, the distance between two edges of the inverted U-shaped groove is 1.1 mm, and the width range of the inverted U-shaped groove is 0.005-0.01 mm.
Preferably, the circular arc of the protruding portion is a semicircle having a radius R of 3 mm; the lower part of the convex part is rectangular, the length of the rectangle is 10 mm, and the width of the rectangle is 4 mm.
Wherein the arc of the protruding part is an ellipse, the major axis of the ellipse is 10 mm, and the minor axis is 7.9 mm; the lower part of the convex part is rectangular, the length of the rectangle is 10 mm, and the width of the rectangle is 4 mm.
Preferably, the length of the C-shaped branch is less than or equal to 17.1 mm, and the length of the reverse C-shaped branch is less than or equal to 15.2 mm.
And the width of the U-shaped groove is less than or equal to 0.6 mm.
Preferably, the material of the dielectric substrate is Rogers5880, and the dielectric substrate has the size of 38 mm in length, 42 mm in width and 0.787 mm in thickness; the dielectric loss tangent angle of the dielectric substrate is 0.09%.
Wherein, the length of the metal grounding plate is 38 mm, and the width is 19.5 mm.
The embodiment of the utility model provides an ultra wide band antenna, it includes: in order to ensure that the dielectric loss of the dielectric substrate is extremely low and the dielectric substrate is suitable for high-frequency and broadband antennas, the dielectric constant is selected to be 2.2, and the thinner the thickness, the better the performance of the antenna is, so the thickness is not suitable to exceed 2 millimeters. A patch antenna is arranged on the upper part of the front surface of the dielectric substrate, and a rectangular ground plate is arranged on the lower part of the back surface of the dielectric substrate; the copper and silver are excellent in conductivity, and in order to guarantee the antenna feed performance, the material of the patch antenna is selected from copper and silver, and the material of the rectangular grounding plate is also selected from copper and silver. Because the ellipse or the circle is in the gradual change shape, according to the impedance gradual change theory of the antenna, in order to ensure that the bandwidth of the antenna is widened, the ellipse or the circle antenna patch in the gradual change shape is selected, so that the impedance of the antenna is reduced, and the bandwidth is increased. Due to the equivalent effect of the outer edge, the center of the patch antenna is hollowed in a convex shape, so that the radiation performance of the antenna cannot be greatly changed, and the bandwidth can be widened. The central hollow is approximately in a convex shape, and the convex part of the central hollow is in a circular arc shape. Similarly, the approximately-shaped protruding part of the central hollow does not have any sudden change due to the arc-shaped structure, so that the bandwidth of the antenna can be wider, and the process implementation requirement is lower.
A feeder line is arranged at the lower part of the front surface of the dielectric substrate, the feeder line is a long strip-shaped metal sheet, one end of the feeder line is connected with the patch antenna, and the other end of the feeder line is superposed with the edge of the side surface of the lower part of the dielectric substrate; the feeder line realizes antenna signal transmission. The junction of the patch antenna and the feeder is close to the feeder, the current density is relatively high, an inverted U-shaped groove is formed in the junction of the patch antenna and the feeder, the arc end of the inverted U-shaped groove is located on the patch antenna, and the end opposite to the arc end is located on the feeder, so that excitation of a trapped wave loop at a higher frequency can be achieved. If the position of the inverted U-shaped groove is too close to the upper part, the trapped wave at the high frequency position cannot be realized; if the position of the inverted U-shaped groove is too low, the current density is too high, and the performance of the antenna is easily changed greatly by changing the feeder line structure. Therefore, in order to avoid the situation that the wavelength at the high frequency is short, a resonant circuit easily appears, the wave frequency band caused by the short wavelength is too wide, the patch antenna is selected to be provided with the inverted U-shaped groove at the connection position of the feeder line, so that only the narrow bandwidth frequency band generates resonance, the trapped wave is realized, and the effect is good. Thereby achieving a notch characteristic at a relatively low frequency. The notch frequency of the antenna is above 9GHz, the antenna can adapt to a 10.525GHz microwave radar chip and work in a narrow-band working system at a relatively high frequency, and the mutual interference between the antenna and the narrow-band working system is effectively avoided.
Drawings
Fig. 1 is a schematic structural diagram of an ultra-wideband antenna according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another ultra-wideband antenna according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an inverted-C branch in the structure of an ultra-wideband antenna according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a C-shaped branch in the structure of an ultra-wideband antenna provided by an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a U-shaped groove in the structure of an ultra-wideband antenna according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of an inverted U-shaped groove in the structure of the ultra-wideband antenna provided by the embodiment of the present invention.
In the figure: 1-central hollow, 2-patch antenna, 3-dielectric substrate, 4-rectangular ground plate, 5-feeder line, 6-inverted C-shaped branch, 7-U-shaped groove, 8-inverted U-shaped groove and 9-C-shaped branch.
Detailed Description
The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings.
Referring to fig. 1 and 2, an embodiment of the present invention provides an ultra-wideband antenna, which includes: the antenna comprises a rectangular dielectric substrate 3, a patch antenna 2 is arranged on the upper part of the front surface of the dielectric substrate 3, and a rectangular grounding plate 4 is arranged on the lower part of the back surface of the dielectric substrate 3; the patch antenna 2 is oval or round, a central hollow part 1 is arranged in the center, the shape of the central hollow part 1 is similar to a convex shape, and the protruding part of the similar convex shape is in an arc shape; a feeder 5 is arranged at the lower part of the front surface of the dielectric substrate 3, the feeder 5 is a long strip-shaped metal sheet, one end of the feeder is connected with the patch antenna 2, and the other end of the feeder is superposed with the edge of the side surface of the lower part of the dielectric substrate 3; an inverted U-shaped groove is formed at the joint of the patch antenna 2 and the feeder 5, the arc end of the inverted U-shaped groove is positioned on the patch antenna 2, and the end opposite to the arc end is positioned on the feeder 5; the thickness of the dielectric substrate 3 is less than or equal to 2 mm, and the dielectric constant is 2.2; the patch antenna 2 is made of copper and silver, and the rectangular grounding plate 4 is made of copper and silver.
The embodiment of the utility model provides an ultra wide band antenna, it includes: in order to ensure that the dielectric loss of the dielectric substrate is extremely low and the dielectric substrate is suitable for high-frequency and broadband antennas, the dielectric constant is selected to be 2.2, and the antenna performance is better when the thickness is thinner, so that the thickness of the dielectric substrate is not more than 2 millimeters. A patch antenna is arranged on the upper part of the front surface of the dielectric substrate, and a rectangular ground plate is arranged on the lower part of the back surface of the dielectric substrate; copper and silver are excellent in conductivity, and for ensuring the antenna feed performance, the material of the patch antenna is selected from copper and silver, and the material of the rectangular grounding plate is also selected from copper and silver. Because the ellipse or the circle is in the gradual change shape, according to the impedance gradual change theory of the antenna, in order to ensure that the bandwidth of the antenna is widened, the ellipse or the circle of the gradual change shape is selected, so that the impedance of the antenna is reduced, and the bandwidth is increased. Due to the equivalent action of the outer edge, the center of the patch antenna is hollowed in a convex shape, so that the radiation performance of the antenna cannot be greatly changed, and the bandwidth can be widened. The central hollow is approximately in a convex shape, and the convex part of the central hollow is in a circular arc shape. Similarly, the approximately-shaped protruding part of the central hollow does not have any sudden change due to the arc-shaped structure, so that the bandwidth of the antenna can be wider, and the process implementation requirement is lower.
A feeder line is arranged at the lower part of the front surface of the dielectric substrate, the feeder line is a long strip-shaped metal sheet, one end of the feeder line is connected with the patch antenna, and the other end of the feeder line is superposed with the edge of the side surface of the lower part of the dielectric substrate; the feeder line realizes antenna signal transmission. The junction of the patch antenna and the feeder is close to the feeder, the current density is relatively high, an inverted U-shaped groove is formed in the junction of the patch antenna and the feeder, the arc end of the inverted U-shaped groove is located on the patch antenna, and the end opposite to the arc end is located on the feeder, so that excitation of a trapped wave loop at a higher frequency can be achieved. If the position of the inverted U-shaped groove is too high, the trapped wave at a high frequency position cannot be realized; if the position of the inverted U-shaped groove is too low, the current density is too high, and the performance of the antenna is easily changed greatly by changing the feeder structure. Therefore, in order to avoid the situation that the wavelength at the high frequency is short, a resonant circuit easily appears, the wave frequency band caused by the short wavelength is too wide, the patch antenna is selected to be provided with the inverted U-shaped groove at the connection position of the feeder line, so that only the narrow bandwidth frequency band generates resonance, the trapped wave is realized, and the effect is good. Thereby achieving a notch characteristic at a relatively low frequency. The notch frequency of the antenna is above 9GHz, the antenna can adapt to a 10.525GHz microwave radar chip and work in a narrow-band working system at a relatively high frequency, and the mutual interference between the antenna and the narrow-band working system is effectively avoided.
Referring to fig. 2 and 5, in the above embodiment, the ultra-wideband antenna may further include a U-shaped groove 7, where the U-shaped groove 7 is located on the patch antenna 2 and between the central hollow portion 1 and the inverted U-shaped groove 8, and the U-shaped groove 7 surrounds the central hollow portion 1. The U-shaped groove 7 is selected because the shape of the U-shaped groove is close to the edge shape of the elliptical patch, and the current direction of the antenna is close to the direction of the U-shaped groove 7 along the outer edge direction of the elliptical patch, so that the current at a certain frequency point can form resonance in the U-shaped groove 7 loop, and the trap function is realized. The U-shaped groove 7 cannot be arranged above the central hollow part 1, because the position above the patch is far away from the feeder line, the current density is low, and a resonant circuit cannot be excited in the U-shaped groove 7, so that the trap cannot be realized.
Referring to fig. 3 and 4, in the above embodiment, the ultra-wideband antenna may further include: c-shaped branches 9 and reverse C-shaped branches 6; the C-shaped branches 9 and the reverse C-shaped branches 6 are located on two sides of the feeder line 5 and are arranged asymmetrically and in a staggered mode. In order to avoid the poor trap effect caused by the large coupling effect generated by the too close branches, the reverse C-shaped branch 6 and the C-shaped branch 9 are arranged on the opposite side of the antenna and are staggered up and down. The C-shaped branches 9 and the reverse C-shaped branches 6 cannot be arranged on the same side and cannot be symmetrically arranged. For example, the C-shaped branches 9 may be arranged above or the reverse C-shaped branches 6 may be arranged above, but the reverse C-shaped branches 6 and the C-shaped branches 9 must be arranged in a staggered manner.
Referring to fig. 6, in the above embodiment, the inverted U-shaped groove 8 has a height L 7 Less than 9.1 mm, and the distance L between two edges of the inverted U-shaped groove 8 8 Is 1.1 mm, the groove width W of the inverted U-shaped groove 8 3 The range is 0.005-0.01 mm, and the four-trap function can be better realized. The trap wave of the frequency band of the 10.525GHz microwave radar chip is realized, and the interference of the current Ku lower-band radar narrow-band system can be responded.
Referring to fig. 1 or 2, in the above embodiment, the arc shape of the protruding portion may be a semicircle, so as to increase the bandwidth of the ultra-wideband antenna. The radius R of the semicircle is 3 mm; the lower portion of the convex portion may be rectangular, and the rectangle may have a length of 10 mm and a width of 4 mm. Alternatively, the circular arc shape of the central hollow 1 may be an ellipse, the major axis of the ellipse may be 10 mm, and the minor axis may be 7.9 mm. On the premise of ensuring the radiation performance of the ultra-wideband antenna, the ultra-wideband antenna has smaller size, convenient processing of a circle, an ellipse or a rectangle and lower process realization difficulty.
Referring to fig. 3, in the above embodiment, the length of the C-shaped branch 9 may be less than or equal to 17.1 mm, and the length of the reverse C-shaped branch 6 may be less than or equal to 15.2 mm. The embodiment of the utility model provides a reverse C type minor matters 6, the length of a side L of one of which is located the upper portion 1 Is 4.5 mm, and has a vertical side length L 2 7 mm, another transverse side length L at the lower part 3 Is 3.7 mm. The inverted C-shaped branches 6 are capable of producing notches at frequencies of 8.00-8.20 GHz. Referring to fig. 4, an embodiment of the present invention provides a lateral length L of a C-shaped branch 9 on an upper portion thereof 4 Is 5.85 mm, and has a vertical side length L 5 5.7 mm, another transverse side length L at the lower part 6 Is 5.6 mm. The C-shaped branches 9 are capable of producing notches at frequencies of 7.19-7.60 GHz.
Referring to fig. 6, the groove width of the U-shaped groove 7 may be less than or equal to 0.6 mm. The width of the U-shaped groove 7 is not too wide, and a narrow-width groove is generally selected, referring to fig. 5, in this embodiment, a circular-arc-shaped U-shaped groove 7 is selected, and the radius of an inner circular arc of the U-shaped groove 7 is R 1 Is selected to be 7.4 mm and the radius R of the outer circular arc 2 Chosen to be 8 mm, the U-shaped slot 7 is capable of producing a notch at a frequency of 4.79-5.52 GHz.
Referring to fig. 1 or fig. 2, in the above embodiment, the material of the dielectric substrate 3 may be Rogers5880, and the dimensions of the dielectric substrate 3 are 38 mm in length, 42 mm in width and 0.787 mm in thickness; the dielectric loss tangent angle of the dielectric substrate 3 is 0.09%. The length of the metal grounding plate is 38 mm, and the width of the metal grounding plate is 19.5 mm. The extremely low dielectric loss of the Rogers5880 dielectric substrate 3 makes it very suitable for high frequency and broadband design applications. The antenna has small integral size by selecting the size, and can be applied to the fields of modern radars and communication. The antenna adopts coaxial line feed operation, has small integral size, and can be widely applied to miniaturized and integrated systems.
Since copper and silver have good conductivity, but silver has a high cost, copper can be selected as a material for manufacturing the patch antenna 2 and the rectangular ground plate 4. The coverage area of the patch antenna 2 on the rectangular ground plate 4 is preferably not overlapped, so as to avoid affecting the performance of the ultra-wideband antenna.
The utility model discloses a carry out the fretwork to the central authorities of oval or circular antenna paster, utilize the antenna impedance gradual change thought, outer fringe equivalent thought, through add anti-C type minor matters 6 in feeder 5 left side top, add C type minor matters 9 in feeder 5 right side below, open U type groove 7 in oval paster central authorities fretwork 1 below, international Telecommunication Union (ITU) frequency channel has been realized respectively, the satellite X wave band, the trapped wave of WLAN frequency channel, through opening the U type groove 8 of narrow width in feeder 5 top, the trapped wave of relative high frequency 10.525GHz department has been realized, the interference of 10.525GHz frequency department microwave radar chip has effectively been avoided, and then the purpose of realizing four trapped waves.
The embodiment of the utility model provides an ultra wide band antenna, it includes: in order to ensure that the dielectric loss of the dielectric substrate is extremely low and the dielectric substrate is suitable for high-frequency and broadband antennas, the dielectric constant is selected to be 2.2, and the thinner the thickness, the better the performance of the antenna is, so the thickness is not suitable to exceed 2 millimeters. A patch antenna is arranged on the upper part of the front surface of the dielectric substrate 3, and a rectangular ground plate is arranged on the lower part of the back surface of the dielectric substrate; copper and silver are excellent in conductivity, and for ensuring the antenna feed performance, the material of the patch antenna is selected from copper and silver, and the material of the rectangular grounding plate is also selected from copper and silver. Because the ellipse or the circle is in the gradual change shape, according to the impedance gradual change theory of the antenna, in order to ensure that the bandwidth of the antenna is widened, the ellipse or the circle of the gradual change shape is selected, so that the impedance of the antenna is reduced, and the bandwidth is increased. Due to the equivalent action of the outer edge, the center of the patch antenna is hollowed in a convex shape, so that the radiation performance of the antenna cannot be greatly changed, and the bandwidth can be widened. The central hollow is approximately in a convex shape, and the convex part of the central hollow is in a circular arc shape. Similarly, the approximately-shaped protruding part of the central hollow does not have any sudden change due to the arc-shaped structure, so that the bandwidth of the antenna can be wider, and the process implementation requirement is lower.
A feeder line is arranged at the lower part of the front surface of the dielectric substrate, the feeder line is a long strip-shaped metal sheet, one end of the feeder line is connected with the patch antenna, and the other end of the feeder line is superposed with the edge of the side surface of the lower part of the dielectric substrate; the feeder line realizes antenna signal transmission. The patch antenna is close to the feeder line, the current density is relatively large, an inverted U-shaped groove is formed in the joint of the patch antenna and the feeder line, the arc end of the inverted U-shaped groove is located on the patch antenna, and the end opposite to the arc end is located on the feeder line, so that excitation of a trap loop at a high frequency position can be achieved. If the position of the inverted U-shaped groove is too high, the trapped wave at a high frequency position cannot be realized; if the position of the inverted U-shaped groove is too low, the current density is too high, and the performance of the antenna is easily changed greatly by changing the feeder line structure. Therefore, in order to avoid the situation that the wavelength at the high frequency is short, a resonant circuit easily appears, the wave frequency band caused by the short wavelength is too wide, the patch antenna is selected to be provided with the inverted U-shaped groove at the connection position of the feeder line, so that only the narrow bandwidth frequency band generates resonance, the trapped wave is realized, and the effect is good. Thereby achieving a notch characteristic at relatively low frequencies. The notch frequency of the antenna is above 9GHz, the antenna can adapt to a 10.525GHz microwave radar chip and work in a narrow-band working system at a relatively high frequency, and mutual interference between the antenna and the narrow-band working system is effectively avoided.
It is apparent to those skilled in the art that the embodiments of the present invention are not limited to the details of the above-described exemplary embodiments, and can be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the embodiments being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned. Furthermore, it is obvious that the word "comprising" does not exclude other elements or steps, and the singular does not exclude the plural. Several units, modules or means recited in the system, apparatus or terminal claims may also be implemented by one and the same unit, module or means in software or hardware. The terms first, second, etc. are used to denote names, but not any particular order.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the embodiments of the present invention and are not limited, and although the embodiments of the present invention have been described in detail with reference to the above preferred embodiments, it should be understood by those skilled in the art that modifications and equivalent substitutions can be made on the technical solutions of the embodiments of the present invention without departing from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. An ultra-wideband antenna, comprising: the antenna comprises a cuboid-shaped dielectric substrate, wherein a patch antenna is laid on the upper part of the front surface of the dielectric substrate, a rectangular grounding plate is laid on the lower part of the back surface of the dielectric substrate, and the length of the rectangular grounding plate is the same as the width of the dielectric substrate; the patch antenna is oval or round in shape, a central hollow is arranged in the center of the patch antenna, the shape of the central hollow is similar to a convex shape, and the protruding part of the similar convex shape is in a circular arc shape; a feeder line is arranged at the lower part of the front surface of the dielectric substrate, the feeder line is a long strip-shaped metal sheet, one end of the feeder line is connected with the patch antenna, and the other end of the feeder line is superposed with the edge of the side surface of the lower part of the dielectric substrate; an inverted U-shaped groove is formed in the joint of the patch antenna and the feeder line, the arc end of the inverted U-shaped groove is located on the patch antenna, and the end, opposite to the arc end, of the inverted U-shaped groove is located on the feeder line; the thickness of the dielectric substrate is less than or equal to 2 mm, and the dielectric constant is 2.2; the patch antenna is made of copper and silver, and the rectangular grounding plate is made of copper and silver.
2. The ultra-wideband antenna of claim 1, further comprising: the U-shaped groove is located on the patch antenna and located between the central hollow portion and the inverted U-shaped groove, and the central hollow portion is surrounded by the U-shaped groove.
3. The ultra-wideband antenna of claim 2, further comprising: c-type branches and reverse C-type branches; the C-shaped branch knots and the reverse C-shaped branch knots are positioned on two sides of the feeder line and are arranged asymmetrically and in a staggered manner.
4. The ultra-wideband antenna of claim 3, wherein the inverted U-shaped slot has a height of less than 9.1 mm, a distance between two edges of the inverted U-shaped slot is 1.1 mm, and a slot width of the inverted U-shaped slot is in a range of 0.005-0.01 mm.
5. The ultra-wideband antenna of claim 4, wherein the arc of the protruding portion is a semicircle having a radius of 3 mm; the lower part of the protruding part is rectangular, the length of the rectangle is 10 mm, and the width of the rectangle is 4 mm.
6. The ultra-wideband antenna of claim 4, wherein the arc of the protruding portion is an ellipse having a major axis of 10 mm and a minor axis of 7.9 mm; the lower part of the protruding part is rectangular, the length of the rectangle is 10 mm, and the width of the rectangle is 4 mm.
7. The UWB antenna of claim 5 or 6 wherein the C-shaped stub length is equal to or less than 17.1 mm, and the anti-C-shaped stub length is equal to or less than 15.2 mm.
8. The ultra-wideband antenna of claim 5 or 6, wherein the slot width of the U-shaped slot is 0.6 mm or less.
9. The ultra-wideband antenna of claim 5 or 6, wherein the material of the dielectric substrate is Rogers5880, and the dielectric substrate has a length of 38 mm, a width of 42 mm and a thickness of 0.787 mm; the dielectric loss tangent angle of the dielectric substrate is 0.09%.
10. The ultra-wideband antenna of claim 9, wherein the rectangular ground plane is 38 mm long and 19.5 mm wide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221067491.8U CN217544933U (en) | 2022-05-06 | 2022-05-06 | Ultra-wideband antenna |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221067491.8U CN217544933U (en) | 2022-05-06 | 2022-05-06 | Ultra-wideband antenna |
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| CN217544933U true CN217544933U (en) | 2022-10-04 |
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| CN202221067491.8U Active CN217544933U (en) | 2022-05-06 | 2022-05-06 | Ultra-wideband antenna |
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