Spiral tapered low-profile ultra-wideband antenna

Abstract

An ultra-wideband antenna comprises a ground plane and an antenna body comprising a planar portion arranged above and parallel to the ground plane. A tapered spiral portion comprises T spiral tapered legs having a spiral shape and tapering horizontally in a direction towards the ground plane, wherein T is an integer greater than 1. L support legs connect an outer edge of the planar portion to the ground plane, wherein L is an integer greater than 1.

Description

[0001] Cross-reference of related applications This application relates to: U.S. Patent Application No. 17 / 409,543 (Attorney-in-charge file No. P100140-US-NP), filed August 23, 2021, entitled "Simple Ultra-Wideband Ultra-Low Profile Antenna"; U.S. Patent Application No. 17 / 409,586 (Attorney-in-charge file No. P100141-US-NP), filed August 23, 2021, entitled "Ultra-Low Profile Ultra-Wideband Antenna"; and U.S. Patent Application No. 17 / 409,646 (Attorney-in-charge file No. P100143-US-NP), filed August 23, 2021, entitled "Simple Ultra-Wideband Ultra-Low Profile Antenna Arranged Above a Sloping Surface". The entire disclosure of the above-cited applications is incorporated herein by reference.

[0002] introduction The information provided in this section is intended to provide a general overview of the background of this disclosure. To the extent described in this section, the work of the currently named inventors, and aspects of the description that may not conform to the prior art at the time of filing, are neither explicitly nor implicitly considered to be prior art of this disclosure. Technical Field

[0003] This disclosure relates to antennas, and more particularly, to ultra-wideband antennas. Background Technology

[0004] Vehicles use telematics systems to support wireless communication and information processing. Examples include cellular communication, GPS navigation, integrated hands-free phones, secure wireless communication, vehicle-to-vehicle (V2V) communication, vehicle-to-infrastructure (V2I) communication, and autonomous driving systems.

[0005] When a vehicle is traveling on a road, the telematics system transmits and receives data. To facilitate wireless connectivity, the vehicle includes one or more antennas connected to the transmitter and / or receiver of the telematics system. Examples of currently used antennas include mast antennas and shark fin antennas. Various subsystems within the telematics system transmit and receive on multiple different frequency bands. Therefore, ultra-wideband (UWB) antennas are a good candidate for cellular antennas.

[0006] Manufacturers strive to create cost-effective, fuel-efficient vehicles with attractive designs. From a design perspective, current antenna designs are often undesirable. For example, shark fin antennas can be mounted on the roof above the center of the rear windshield or on the trunk lid. Understandably, placing shark fin antennas in those locations detracts from the vehicle's exterior design. These types of antennas typically have a height approximately 1 / 4 of the wavelength at the lowest desired operating frequency. Summary of the Invention

[0007] An ultra-wideband antenna includes a ground plane and an antenna body. The antenna body includes a planar portion disposed above and parallel to the ground plane. A tapering helical portion includes T helical tapering legs having a helical shape and tapering horizontally in a direction toward the ground plane, where T is an integer greater than 1. L support legs connect the outer edge of the planar portion to the ground plane, where L is an integer greater than 1.

[0008] Among other features, the planar portion includes a central opening, and a tapering helical portion is spaced apart from the planar portion and centered relative to the central opening. T helical tapering legs of the tapering helical portion are located below and connected to the planar portion outside the central opening. The horizontal length of the T helical tapering legs of the tapering helical portion monotonically decreases in the direction toward the ground plane.

[0009] Among other features, the planar portion has an outer edge with a shape selected from the group consisting of circles, rectangles, and ellipses. The antenna feed line connects to the lower edge of the tapered spiral portion. The height of the antenna body is approximately 1 / 19 of the wavelength corresponding to the lowest desired operating frequency, and the width of the planar portion is equal to 2 to 10 times the height of the antenna body. The planar portion includes a central opening and also includes an annular portion arranged within the central opening and coplanar with the planar portion.

[0010] Among other features, the upper edge of the tapered helical portion connects to the annular portion, and the T tapered legs of the tapered helical portion are located radially inward of the central opening. The support structure is made of a non-conductive material and is configured to support at least one of the planar portion, the tapered helical portion, and the annular portion.

[0011] An ultra-wideband antenna includes: a first antenna body comprising a first planar portion; a first tapered spiral portion comprising a first T horizontally tapered spiral legs having a spiral shape, where T is an integer greater than 1; and a first L supporting legs, where L is an integer greater than 1. A second antenna body comprises a second planar portion, a second tapered spiral portion, and a second L supporting legs. The second tapered spiral portion comprises a second T horizontally tapered spiral legs having a spiral shape, where T is an integer greater than 1, and L is an integer greater than 1. The second antenna body is mirror-symmetrical with respect to the first antenna body, and the first L supporting legs are connected to the second L supporting legs.

[0012] Among other features, the first planar portion includes a first central opening, and wherein a first tapered spiral portion is centered relative to the first central opening. The first T spirally tapered legs of the first spiral portion are located below and connected to the first planar portion outside the first central opening. The horizontal length of the first T spirally tapered legs of the first spiral portion monotonically decreases. The outer edge of the first planar portion has a shape selected from the group consisting of circles, rectangles, and ellipses. An antenna feed line is connected to the lower edges of the first and second spiral portions.

[0013] Among other features, the height of the first antenna body is approximately 1 / 19 of the wavelength corresponding to the lowest desired operating frequency, and the width of the planar portion is equal to 2 to 10 times the height of the first antenna body. The first planar portion includes a first central opening and also includes a first annular portion disposed in the first central opening and coplanar with the first planar portion. The upper edge of the first tapered spiral portion is connected to the first annular portion, and wherein the first T tapered spiral legs of the first tapered spiral portion are located radially inward of the first central opening. A first support structure, made of a non-conductive material, is configured to support at least one of the first planar portion, the first tapered spiral portion, and the first annular portion.

[0014] This invention provides the following technical solutions: 1. An ultra-wideband antenna, comprising: ground level; and The antenna body includes: A planar portion, which is arranged above and parallel to the ground plane; The tapering helical section includes T helical tapering legs, each helical tapering leg having a helical shape and tapering horizontally in the direction toward the ground plane, where T is an integer greater than 1; and L supporting legs connect the outer edge of the planar portion to the ground plane, where L is an integer greater than 1.

[0015] According to the ultra-wideband antenna of technical solution 1, the planar portion includes a central opening, and the tapered spiral portion is spaced apart from the planar portion and centered relative to the central opening.

[0016] According to the ultra-wideband antenna of technical solution 2, the T spiral tapering legs of the tapering spiral portion are located below and connected to the planar portion outside the central opening.

[0017] According to the ultra-wideband antenna of technical solution 1, the horizontal length of the T spiral legs of the tapered spiral portion decreases monotonically in the direction toward the ground plane.

[0018] According to the ultra-wideband antenna of technical solution 1, the outer edge of the planar portion has a shape selected from the group consisting of circles, rectangles and ellipses.

[0019] According to the ultra-wideband antenna of technical solution 1, the antenna feed line is connected to the lower edge of the tapered spiral portion.

[0020] According to the ultra-wideband antenna of technical solution 1, the height of the antenna body is approximately 1 / 19 of the wavelength corresponding to the lowest required operating frequency, and the width of the planar portion is equal to 2 to 10 times the height of the antenna body.

[0021] According to the ultra-wideband antenna of technical solution 1, the planar portion includes a central opening and also includes an annular portion, the annular portion being arranged in the central opening, spaced apart from the planar portion, and coplanar with the planar portion.

[0022] According to the ultra-wideband antenna of technical solution 8, the upper edge of the tapered spiral portion is connected to the annular portion, and the T tapered spiral legs of the tapered spiral portion are located radially inside the central opening.

[0023] The ultra-wideband antenna according to technical solution 8 further includes a support structure made of a non-conductive material and configured to support at least one of the planar portion, the spiral tapering portion, and the annular portion.

[0024] An ultra-wideband antenna, comprising: The first antenna body includes: First plane section; The first tapering spiral portion includes a first T tapering spiral legs, each of which has a spiral shape and tapers horizontally, where T is an integer greater than 1; and The first L supporting legs, where L is an integer greater than 1; and The second antenna body includes: Second plane section; The second tapering spiral portion includes a second T tapering spiral legs, the second T tapering spiral legs having a spiral shape and tapering horizontally, where T is an integer greater than 1; and The second L supporting legs, where L is an integer greater than 1. The second antenna body is a mirror image of the first antenna body, and the first L support legs are connected to the second L support legs.

[0025] According to the ultra-wideband antenna of technical solution 11, the first planar portion includes a first central opening, and the first tapered spiral portion is spaced apart from the first planar portion and centered relative to the first central opening.

[0026] According to the ultra-wideband antenna of technical solution 12, the first T spiral tapered legs of the first tapered spiral portion are located below and connected to the first planar portion outside the first central opening.

[0027] According to the ultra-wideband antenna of technical solution 11, the horizontal length of the first T spiral tapering legs of the first tapering spiral portion decreases monotonically.

[0028] According to the ultra-wideband antenna of technical solution 11, the outer edge of the first planar portion has a shape selected from the group consisting of circles, rectangles and ellipses.

[0029] According to the ultra-wideband antenna of technical solution 11, the antenna feed line is connected to the lower edge of the first tapered spiral portion and the second tapered spiral portion.

[0030] According to the ultra-wideband antenna of technical solution 12, the height of the first antenna body is approximately 1 / 19 of the wavelength corresponding to the lowest desired operating frequency, and the width of the planar portion is equal to 2 to 10 times the height of the first antenna body.

[0031] According to the ultra-wideband antenna of technical solution 11, the first planar portion includes a first central opening and also includes a first annular portion, the first annular portion being arranged in the first central opening, spaced apart from the first central opening and coplanar with the first planar portion.

[0032] According to the ultra-wideband antenna of technical solution 18, the upper edge of the first tapered spiral portion is connected to the first annular portion, and the first T spiral tapered legs of the first tapered spiral portion are located radially inside the first central opening.

[0033] The ultra-wideband antenna according to technical solution 18 further includes a first support structure, which is made of a non-conductive material and is configured to support at least one of a first planar portion, a first spiral tapering portion, and a first annular portion.

[0034] Further applications of this disclosure will become apparent from the detailed description, claims, and accompanying drawings. The detailed description and specific examples are for illustrative purposes only and are not intended to limit the scope of the invention. Attached Figure Description

[0035] This disclosure will be more fully understood based on the detailed description and accompanying drawings, wherein: Figure 1 This is a side view of an example of an ultra-wideband (UWB) antenna according to the present disclosure, which includes a spiral tapering portion and is arranged above the ground plane. Figure 2 yes Figure 1 A perspective view of the UWB antenna; Figure 3 This is a perspective view of another example of an ultra-wideband (UWB) antenna according to this disclosure, which includes a spiral tapering portion and is arranged above the ground plane. Figure 4 This is a perspective view of another example of an ultra-wideband (UWB) antenna according to this disclosure, which includes a spiral tapering portion and is arranged above the ground plane; Figure 5 This is a perspective view of another example of an ultra-wideband (UWB) antenna according to this disclosure, which includes a spiral tapering portion and is arranged above the ground plane; Figure 6 This is a side view of an example UWB antenna according to the present disclosure, which includes a first antenna body and a second antenna body, the second antenna body being a mirror image of and connected to the first antenna body; and Figure 7 It is based on the purpose of this disclosure. Figure 1 A plan view of an example support structure for a UWB antenna.

[0036] In the accompanying drawings, reference numerals may be used repeatedly to identify similar and / or identical elements. Detailed Implementation

[0037] The ultra-wideband (UWB) antenna according to this disclosure includes a planar portion, a spirally tapered portion disposed between the planar portion and a ground plane, and legs connecting the edge of the planar portion to the ground plane. The UWB antenna has a very low profile, which allows the UWB antenna to be positioned in a less conspicuous interior or exterior vehicle location.

[0038] In some examples, the UWB antenna according to this disclosure may have a height approximately 1 / 19 of the wavelength at the lowest desired operating frequency of the antenna. This very low profile allows the UWB antenna to be less conspicuous when used as a cellular antenna on the roof or elsewhere in the vehicle. For example, the UWB antenna may be concealed beneath a non-conductive cover formed in a cavity in the vehicle roof and above a grounded conductive plane (which may be the same as or different from the antenna's ground plane).

[0039] Now for reference Figure 1 and 2 The image shows a UWB antenna 100. Figure 1 In this embodiment, the UWB antenna 100 includes an antenna body 114 having a planar portion 118. The planar portion 118 is arranged in a plane that is generally parallel to and above the ground plane 122. In some examples, the planar portion 118 has a generally circular or elliptical shape in a plan view.

[0040] A tapering helical section 130 comprising T helical tapering legs 132 (where T is an integer greater than 1) lies between the planar section 118 and the ground plane 122. As the distance from the planar section 118 to the ground plane 122 decreases, the T helical tapering legs 132 taper horizontally from a longer horizontal width to a shorter horizontal width. The T helical tapering legs 132 are helical because the legs have a helical shape when viewed from above. The helical shape allows each leg to have a longer length in a given area. Although T helical tapering legs 132 with T=4 are shown, two or more can be used. In some examples, each of the T helical tapering legs 132 heaves approximately 360 / T degrees in the horizontal plane, although higher or lower helix angles can be used.

[0041] The outer edge of the planar portion 118 is supported on L support legs 126 (where L is an integer greater than 1), which extend between the planar portion 118 and the ground plane 122. The L support legs 126 extend from the outer edge of the planar portion 118 and connect to the ground plane 122.

[0042] A gap 136 is defined between the lower edge 138 of the tapered spiral portion 130 and the ground plane 122. In some examples, the antenna feed line 142 extends through an opening (not shown) formed in the ground plane 122 and connects to the antenna body 114 at the lower edge 138 of the tapered spiral portion 130. By way of example only, the antenna feed line 142 may include the inner conductor of a coaxial cable. A braided copper shield of the coaxial cable (not shown) may be connected to the ground plane 122. While a particular type of antenna feed line and feed line location are shown for illustrative purposes, other antenna feed line arrangements can be used to feed the antenna body 114. For example, the inner conductor of the antenna feed line may be arranged parallel to the ground plane 122 instead of passing through it.

[0043] exist Figure 2 In the diagram, the planar portion 118 is shown to include a central opening 150 and a top annular portion 152. A gap is formed between the outer edge 154 of the top annular portion 152 and the central opening 150. The top annular portion 152 includes an inner opening 158. In some examples, the radially outer edge 172 of the planar portion 118 includes an inwardly extending notch 170, and L support legs 126 extend from the inner edge of the notch 170.

[0044] The antenna body 114 may be made entirely of a conductive material such as metal. Alternatively, one or more portions of the antenna body 114 may include a support surface made of a non-conductive material and a layer made of a conductive material attached to the non-conductive material. Figure 7 An example of a support structure is shown, although other support structures can also be used.

[0045] L support legs 126 are connected to the outer edge of the planar portion 118. Although the T spiral legs 132 of the tapered spiral portion 130 are connected to the top annular portion 152, they are spaced apart from the planar portion 118 in the central opening 150 (in other words, they are capacitively coupled to the planar portion 118). In other examples, the T spiral legs 132 of the tapered spiral portion 130 are connected to the planar portion 118.

[0046] Unrestricted by any theory, the UWB antenna 100 operates like a monoconical antenna, where the planar portion acts as a capacitive top arranged at the opening of the monoconical antenna, and the L supporting legs act as inductors.

[0047] Most antenna designs require the height of the UWB antenna to be approximately ¼ of the wavelength corresponding to the lowest desired operating frequency of the UWB antenna 100. The UWB antenna 100 according to this disclosure can be designed to have a very low vertical height, which is approximately 1 / 19 of the wavelength corresponding to the lowest desired operating frequency. As used herein, approximately 1 / 19 of the wavelength means 4% to 6% of the wavelength corresponding to the lowest desired operating frequency of the antenna. The UWB antenna has F high / F low = 1∶10 approximate bandwidth ratio, where F high It is the highest frequency matched by the UWB antenna, and F low It is the lowest frequency that the UWB antenna is matched to.

[0048] In some examples, the planar portion 118 can have various shapes, such as circular, planar, or elliptical, and the width or diameter of the planar portion is 2 to 10 times the height of the antenna body 114. The ground plane 122 is typically larger than the antenna body 114. In some examples, the ground plane 122 is a predetermined distance larger than the antenna body 114 and is symmetrical with respect to the sides of the antenna body 114. In other examples, the ground plane 122 is asymmetrical with respect to the sides of the antenna body 114.

[0049] Now for reference Figure 3-5 The number, size, and location of openings in the planar portion can vary, or one or all openings can be omitted. Figure 3In the figure, the UWB antenna 200 includes a central opening 210 in the planar portion 208. The radially inner portions of the T spirally tapered legs 132 of the tapered spiral portion 130 are not covered by the planar portion 118 as shown. As shown, the radially outer portions of the T spirally tapered legs 132 are covered by and connected to the planar portion 118.

[0050] exist Figure 4 In this design, the UWB antenna 250 includes an annular planar portion 252 with a central opening 254. A central planar portion 256 is coplanar with the planar portion 252 and includes a radially outer edge 258 that defines an annular opening 260 relative to the central opening 254. The central planar portion 256 may be arranged to contact the upper edges of T helical tapered legs (not shown). The slotted opening 260 may be arranged radially outward of the T helical tapered legs. Alternatively, the slotted opening 260 may be arranged to partially overlap with the T helical tapered legs, provided that the T helical legs do not shorten the gap. In other words, provided that the gap does not have a bypass (T helical legs) that forms electrical continuity.

[0051] exist Figure 5 In the UWB antenna 300, there is a planar portion 318 without an opening.

[0052] exist Figures 1 to 5 In the UWB antenna shown, the UWB antenna is positioned above ground plane 122. In this design, ground plane 122 acts as a mirror. A similar effect can be achieved by adding a second antenna body that is mirrored relative to the removed ground plane and connected to the first antenna body, as shown. Figure 6 As shown. The mirror effect is similar to the mirror image of a monopole antenna above the ground plane, in order to obtain a dipole antenna in free space where there is no ground plane.

[0053] exist Figure 6 The image shows another example of a UWB antenna 400. The UWB antenna 400 includes first and second antenna bodies 114-1 and 114-2. The second antenna body 114-2 is mirrored and connected to the edges 138-1 and 138-2 of the first antenna body 114-1. The first and second antenna bodies 114-1 and 114-2 are similar to... Figure 1 Antenna body 114 is described in the figure. Similar reference numerals are used for components associated with the first antenna body 114-1 (with "-1") and the second antenna body 114-2 (with "-2"). The end of the leg 126-1 of the first antenna body 114-1 is connected to the end of the leg 126-2 of the second antenna body 114-2. Antenna feed line positions 410 are connected to the tapered spiral portions 130-1 and 130-2 of the first and second antenna bodies 114-1 and 114-2, respectively.

[0054] Now for reference Figure 7 An example of an antenna support structure 500 is shown, which can be used for support. Figure 1 The antenna support structure 500 comprises a non-conductive body 514 and non-conductive legs 534. The non-conductive body 514 includes a non-conductive planar portion 518 disposed below the planar portion of the antenna body. In some examples, the non-conductive planar portion 518 includes S slots 524 arranged in a pattern (where S is an integer greater than 1). In some examples, S=4, but more or fewer slots can be used. In some examples, the S slots 524 are arcuate and the pattern is circular, but other slot shapes and patterns can be used.

[0055] An internal opening 528 in the non-conductive planar portion 518 is located inside the S-groove 524 and includes a central opening 530 and a spiral opening 532 extending outward from the central opening 530. In some examples, portions of the T spirally tapered legs 132 of the tapered spiral portion 130 are arranged in the spiral opening 532 and the central opening 530. In this example, the non-conductive legs 534 extend from the outer edge of the non-conductive planar portion 518 (instead of from the notch shown above). Components of the antenna body are arranged on top of and connected to the antenna support structure 500, which provides support.

[0056] The length, width, and height of the UWB antenna described in this article can be adjusted to achieve different design criteria, such as the frequency, bandwidth, and / or radiation profile of the UWB antenna.

[0057] The foregoing description is illustrative in nature and is by no means intended to limit this disclosure, its application, or its use. The broad teachings of this disclosure can be implemented in many forms. Therefore, while this disclosure includes specific examples, its true scope should not be so limited, as other modifications will become apparent upon examination of the drawings, specification, and appended claims. It should be understood that one or more steps in the method may be performed in a different order (or simultaneously) without altering the principles of this disclosure. Furthermore, while each embodiment is described above as having certain features, any one or more of those features described with respect to any embodiment of this disclosure may be implemented in and / or combined with features of any other embodiment, even if such combination is not explicitly described. In other words, the described embodiments are not mutually exclusive, and substitutions of one or more embodiments for each other remain within the scope of this disclosure.

[0058] Spatial and functional relationships between components (e.g., between modules, circuit elements, semiconductor layers, etc.) are described using various terms, including “connection,” “joint,” “coupled,” “adjacent,” “next to,” “on top,” “above,” “below,” and “set.” Unless explicitly described as “direct,” when describing the relationship between first and second components in the above disclosure, the relationship can be a direct relationship where no other intervening components exist between the first and second components, but it can also be an indirect relationship (spatial or functional) between the first and second components with one or more intervening components. As used herein, the phrase at least one of A, B, and C should be interpreted as representing a logic (A or B or C) using a non-exclusive logical OR, and should not be interpreted as representing “at least one of A, at least one of B, and at least one of C.”

Claims

1. An ultra-wideband antenna, comprising: Ground level; and The antenna body includes: A planar portion, which is arranged above and parallel to the ground plane; The tapering helical section includes T helical tapering legs, each helical tapering leg having a helical shape and tapering horizontally in the direction toward the ground plane, where T is an integer greater than 1; and L supporting legs connect the outer edge of the planar portion to the ground plane, where L is an integer greater than 1; The planar portion includes a central opening, and the ultra-wideband antenna further includes a ring-shaped portion disposed within the central opening, spaced apart from and coplanar with the planar portion; and The upper edge of the tapered spiral portion is connected to the annular portion, and the T spiral tapered legs of the tapered spiral portion are located radially inside the central opening.

2. The ultra-wideband antenna of claim 1, wherein, The tapering spiral portion is separated from the planar portion and is centered relative to the central opening.

3. The ultra-wideband antenna according to claim 2, wherein, The T spiral legs of the tapered spiral section are located below and connected to the planar portion outside the central opening.

4. The ultra-wideband antenna according to claim 1, wherein, The horizontal length of the T spiral legs of the tapering spiral section decreases monotonically in the direction toward the ground plane.

5. The ultra-wideband antenna according to claim 1, wherein, The outer edge of the planar portion has a shape selected from the group consisting of circles, rectangles, and ellipses.

6. The ultra-wideband antenna according to claim 1, wherein, The antenna feed line is connected to the lower edge of the tapered spiral section.

7. The ultra-wideband antenna according to claim 1, wherein, The height of the antenna body is approximately 1 / 19 of the wavelength corresponding to the lowest desired operating frequency, and the width of the planar portion is equal to 2 to 10 times the height of the antenna body.

8. The ultra-wideband antenna of claim 1 further includes a support structure made of a non-conductive material and configured to support at least one of the planar portion, the tapered spiral portion, and the annular portion.

9. An ultra-wideband antenna, comprising: The first antenna body includes: First plane section; The first tapering spiral portion includes a first T tapering spiral legs, each of which has a spiral shape and tapers horizontally, where T is an integer greater than 1; and The first L supporting legs, where L is an integer greater than 1; and The second antenna body includes: Second plane section; The second tapering spiral portion includes a second T tapering spiral legs, the second T tapering spiral legs having a spiral shape and tapering horizontally, where T is an integer greater than 1; and The second L supporting legs, where L is an integer greater than 1. The second antenna body is a mirror image of the first antenna body, and the first L support legs are connected to the second L support legs. The first planar portion includes a first central opening, and the ultra-wideband antenna further includes a first annular portion, which is disposed within the first central opening, spaced apart from and coplanar with the first planar portion; and Wherein, the upper edge of the first tapered spiral portion is connected to the first annular portion, and wherein the first T spiral tapered legs of the first tapered spiral portion are located radially inside the first central opening.

10. The ultra-wideband antenna according to claim 9, wherein, The first tapering spiral portion is separated from the first planar portion and is centered relative to the first central opening.

11. The ultra-wideband antenna according to claim 10, wherein, The first T spiral tapering legs of the first tapering spiral section are located below and connected to the first planar portion outside the first central opening.

12. The ultra-wideband antenna according to claim 9, wherein, The horizontal length of the first T spiral tapering legs of the first tapering spiral section decreases monotonically.

13. The ultra-wideband antenna according to claim 9, wherein, The outer edge of the first planar portion has a shape selected from the group consisting of circles, rectangles and ellipses.

14. The ultra-wideband antenna according to claim 9, wherein, The antenna feed line is connected to the lower edges of the first tapered spiral section and the second tapered spiral section.

15. The ultra-wideband antenna according to claim 10, wherein, The height of the first antenna body is approximately 1 / 19 of the wavelength corresponding to the lowest desired operating frequency, and the width of the planar portion is equal to 2 to 10 times the height of the first antenna body.

16. The ultra-wideband antenna of claim 9 further includes a first support structure made of a non-conductive material and configured to support at least one of a first planar portion, a first tapered spiral portion, and a first annular portion.

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