Multi-band ultra wide band patch antenna working in X band

Abstract

The utility model discloses a multi-band ultra-wideband patch antenna working in an X band. The multi-band ultra-wideband patch antenna comprises a dielectric substrate, a first rectangular patch and a second rectangular patch, the first rectangular patch is used as a microstrip feed unit, and the first narrow edge of the first rectangular patch is aligned with the edge of the dielectric substrate; the side edge of the second rectangular patch is spliced with the second narrow edge of the first rectangular patch to form a T-shaped patch; two first rectangular slots are formed in the side edge of the second rectangular patch, and a second rectangular slot and two third rectangular slots are formed in the second rectangular patch; the two third rectangular open grooves are parallel to the first rectangular open groove and located in the two ends of the second rectangular open groove. And the two third rectangular slots and the second rectangular slot are arranged at intervals to form an H-shaped layout. The ultra-wideband antenna has ultra-wideband characteristics and a plurality of working frequency bands, and meets the requirements of a modern high-frequency communication system on performances such as bandwidth, gain, directivity and the like.

Description

TECHNICAL FIELD

[0001] The utility model relates to antenna technical field, especially relate to the multi -band ultra -wide band patch antenna design of working in X wave band, be applicable to the efficient signal transmission and reception of high frequency band in communication system. BACKGROUND

[0002] With the rapid development of wireless communication technology, the demand for antennas is growing. Especially in high frequency band, such as radar, satellite communication, wireless communication and other fields, the bandwidth, gain, directivity and other performance of the antenna have strict requirements. Especially in X wave band (8~12GHz), due to its wide application in radar detection, satellite communication, military application and wireless sensing, it is particularly important to design an efficient and wideband antenna.

[0003] However, the traditional antenna design often has frequency band limitation, which cannot meet the working requirements of multiple frequency bands at the same time. Especially under the background of the rapid development of wideband communication and ultra-wideband (UWB) technology, the bandwidth and performance of the antenna become the key factors affecting the communication quality of the system. Ultra-wideband technology (UWB) has been widely used in wireless personal area network (WPAN), radar imaging, sensor network and other fields due to its high data transmission rate, low delay, strong anti-interference ability and other characteristics. The core advantage of UWB system is that it works in a very wide frequency spectrum range, and designing an antenna with ultra-wideband characteristics and covering multiple high frequency bands becomes an important technical requirement in modern communication systems.

[0004] In addition, with the rapid development of 5G communication and Internet of Things (IoT) technology, the demand for low-power, wideband and efficient antennas is increasingly urgent. Especially for ultra-wideband (UWB) communication systems, the antenna is required to provide wideband support with low reflection loss and high transmission efficiency.

[0005] Therefore, how to provide a high-performance X wave band multi-band ultra-wideband patch antenna with ultra-wideband characteristics and covering multiple high frequency bands is a technical problem to be solved by those skilled in the art. Utility model content

[0006] The utility model provides a multi-band ultra-wideband patch antenna working in X wave band in view of the above research status and the multi-band demand of X wave band and higher frequency band, has ultra-wideband characteristics and multiple working frequency bands, aims at overcoming the problem of frequency band limitation in the prior art, realizes efficient work of the antenna in multiple frequency bands such as 8.37~10.36GHz, 10.77~11.8GHz, 12.74~13.74GHz through innovative design, meets the requirements of modern high frequency communication system on bandwidth, gain, directivity and other performances.

[0007] The utility model provides a kind of multi-band ultra-wideband patch antenna operating in X band, comprising: dielectric substrate, first rectangular patch, second rectangular patch;Wherein,

[0008] The first rectangular patch and the second rectangular patch are attached to the upper surface of the dielectric substrate in the thickness direction;The first rectangular patch serves as a microstrip feed unit, with its first narrow side aligned with the edge of the dielectric substrate;The side of the second rectangular patch is spliced with the second narrow side of the first rectangular patch, forming a "T" shaped patch.

[0009] Two first rectangular slots are opened on the side of the second rectangular patch, and one second rectangular slot and two third rectangular slots are opened in the second rectangular patch.

[0010] The two first rectangular slots are perpendicular to the side and symmetrically arranged along the extension line of the long side of the first rectangular patch.

[0011] The second rectangular slot is parallel to the side, and the midpoint of the second rectangular slot is located on the central axis of the long side extension line of the first rectangular patch.

[0012] The two third rectangular slots are parallel to the first rectangular slots and located at the two ends of the second rectangular slot;The two third rectangular slots are spaced apart from the second rectangular slot, forming an "H" shaped layout.

[0013] The structure and positional relationship of the patch and the rectangular slot can enable the patch antenna to effectively work in the three main frequency bands of X band, improve the data transmission capacity of the communication system, and meet the wide applicability in different communication systems.

[0014] Preferably, the upper surface of the dielectric substrate in the thickness direction is provided with an upper metal coating layer.

[0015] Preferably, the lower surface of the dielectric substrate in the thickness direction is provided with a metal coating layer ground plate.

[0016] Preferably, it further includes a microwave connector;The metal coating layer ground plate and the microstrip feed unit are both connected to the microwave connector.

[0017] Preferably, the first rectangular slot, the second rectangular slot and the third rectangular slot are all hollow slots penetrating through the second rectangular patch in the thickness direction of the second rectangular patch.

[0018] Preferably, the distance between the two first rectangular slots is equal to the width of the narrow side of the first rectangular patch.

[0019] Preferably, the midpoint of the side of the second rectangular patch is located on the central axis of the first rectangular patch; the two first rectangular slots and the two third rectangular slots are symmetrically arranged along the central axis of the long side extension line of the first rectangular patch.

[0020] Preferably, the medium substrate has a length of 72.5mm and a width of 52.5mm; the first rectangular patch has a length of 23mm and a width of 3mm; and the second rectangular patch has a length of 29mm and a width of 24.6mm.

[0021] Preferably, the first rectangular slot has a length of 10mm and a width of 3.5mm.

[0022] Preferably, the second rectangular slot has a length of 11.6mm and a width of 3mm; and the third rectangular slot has a length of 11mm and a width of 2mm.

[0023] Compared with the prior art, the antenna structure has the following beneficial effects:

[0024] The antenna structure can cover multiple sub-frequency bands of the X band and extend to a higher frequency band, realizes efficient work of the antenna in multiple frequency bands such as 8.37-10.36GHz, 10.77-11.8GHz and 12.74-13.74GHz, and has wide applicability; the multiple frequency band widths of the antenna have super wide band characteristics, which enable the antenna to provide high-speed data transmission and low interference performance in multiple communication systems;

[0025] The antenna structure not only has wide band coverage capability of high frequency bands, but also has excellent matching performance, low VSWR and high gain, ensures high efficiency and stability of the system, and can adapt to the development trend of various modern wireless communication technologies;

[0026] The structure design of the patch and the slot ensures high gain and good directivity of the antenna, and is suitable for directional communication application.

[0027] The antenna structure has a good planar structure, can be formed on a printed circuit board through etching, is convenient for integration with other circuits and devices, and reduces production cost.

[0028] In summary, the antenna structure of the present application meets the demand of future communication systems for high-efficiency, wide-band and multi-frequency band antennas, has good application prospect, and can effectively support high data rate and low delay communication, and meet the performance requirements of new generation wireless communication and radar detection, especially in the fields of radar, satellite communication, wireless sensor network and 5G communication. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the description of the embodiments or the prior art. Obviously, the drawings described below are only a part of the embodiments of the present application, and not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the present application.

[0030] Figure 1 is the overall structure schematic diagram of the multi-band ultra-wideband patch antenna working in X band provided by the embodiment of the present application;

[0031] Figure 2 is the top view of the multi-band ultra-wideband patch antenna working in X band provided by the embodiment of the present application;

[0032] Figure 3 is the curve diagram of the return loss S11 of the multi-band ultra-wideband patch antenna working in X band provided by the embodiment of the present application;

[0033] Figure 4 is the xoy plane pattern of the multi-band ultra-wideband patch antenna working in X band under 8.5GHz excitation provided by the embodiment of the present application;

[0034] Figure 5 is the yoz plane pattern of the multi-band ultra-wideband patch antenna working in X band under 8.5GHz excitation provided by the embodiment of the present application.

[0035] In the drawings,

[0036] 1 is a dielectric substrate;2 is a first rectangular patch;3 is a second rectangular patch;4 is a second rectangular slot;5 is a third rectangular slot;6 is a first rectangular slot;7 is a microwave connector;8 is a metal coating layer ground plate. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the present application.

[0038] The utility model discloses a kind of multi-band ultra-wideband patch antennas operating in X-band, comprising: dielectric substrate 1, first rectangular patch 2, second rectangular patch 3;First rectangular patch 2 and second rectangular patch 3 are attached to the upper surface of dielectric substrate 1 along the thickness direction;First rectangular patch 2 is as microstrip feed unit, and its first narrow side is aligned with the edge of dielectric substrate 1;The side of second rectangular patch 3 is spliced with the second narrow side of first rectangular patch 2, and constitutes "T" type patch;Two first rectangular slots 6 are provided on the side of second rectangular patch 3, and one second rectangular slot 4 and two third rectangular slots 5 are provided in second rectangular patch 3;Two first rectangular slots 6 are perpendicular to the side, and are symmetrically arranged along the two sides of the long side extension line of first rectangular patch 2;Second rectangular slot 4 is parallel to the side, and the midpoint of second rectangular slot 4 is located on the central axis of the long side extension line of first rectangular patch 2;Two third rectangular slots 5 are parallel to first rectangular slot 6, and are located at the two ends of second rectangular slot 4;Two third rectangular slots 5 are spaced apart from second rectangular slot 4, and form "H" type layout.

[0039] As shown in Figures 1-2 The long side direction of first rectangular slot 6 and the long side direction of third rectangular slot 5 are both arranged in parallel to x axis direction, and the long side direction of second rectangular slot 4 is arranged in parallel to y axis direction;The x axis positions of two first rectangular slots 6 are same, and y axis positions are different and symmetric to first rectangular patch 2;Similarly, the x axis positions of two third rectangular slots 5 are same, and y axis positions are different and symmetric to first rectangular patch 2.

[0040] Dielectric substrate 1 is rectangular plate with edges arranged along x axis and y axis respectively, and second rectangular patch 3 is located in the central region of dielectric substrate 1.The overall structure of patch antenna presents axial symmetry, and each rectangular slot is not connected to each other.

[0041] The embodiment can effectively work in the following multiple frequency bands:

[0042] First main passband 1: 8.37~10.36GHz, which covers part of X-band, meets the requirements of high-frequency communication and radar system, and has a relatively wide relative bandwidth, and the bandwidth relative to the center frequency reaches 21.2%, which meets the requirements of ultra-wideband (UWB).

[0043] Second main passband 2: 10.77~11.8GHz, which covers another part of X-band, is suitable for various high-precision applications, such as radar, satellite communication, etc.Compared with the first frequency band, the bandwidth of this frequency band is narrower, but it can still provide effective communication capability.

[0044] The third main frequency band 3 is 12.74-13.74 GHz, which is located in a frequency range above 12 GHz, that is, the embodiment can not only meet part of the requirements of the X-band (8-12 GHz), but also effectively work in a higher frequency band (12.74-13.74 GHz), further expanding the application range of the antenna, and being suitable for a communication system of a higher frequency band, in particular, a satellite and an advanced radar system.

[0045] In an embodiment, the upper surface of the dielectric substrate 1 along the thickness direction is provided with an upper metal coating layer.

[0046] In an embodiment, the lower surface of the dielectric substrate 1 along the thickness direction is provided with a metal coating layer grounding plate 8, and the size of the metal coating layer grounding plate 8 is consistent with the size of the dielectric substrate 1.

[0047] In the embodiment, a microwave joint 7 is further included, and the metal coating layer grounding plate 8 and the microstrip feed unit are both connected to the microwave joint 7. Figure 1 As shown in FIG. 1, the bottom narrow edge of the first rectangular patch 2 is flush with the edge of the dielectric substrate 1, and is fed through the microwave joint 7.

[0048] In an embodiment, the first rectangular slot 6, the second rectangular slot 4 and the third rectangular slot 5 are all hollow slots penetrating the second rectangular patch 3 along the thickness direction of the second rectangular patch 3.

[0049] In an embodiment, the distance between the two first rectangular slots 6 is equal to the width of the narrow edge of the first rectangular patch 2.

[0050] In an embodiment, the midpoint of the side edge of the second rectangular patch 3 is located on the central axis of the first rectangular patch 2, and the two first rectangular slots 6 and the two third rectangular slots 5 are symmetrically arranged along the central axis of the long edge extension line of the first rectangular patch 2.

[0051] In an embodiment, the length of the dielectric substrate 1 is 72.5 mm, and the width is 52.5 mm; the length of the first rectangular patch 2 is 23 mm, and the width is 3 mm; and the length of the second rectangular patch 3 is 29 mm, and the width is 24.6 mm.

[0052] In the embodiment, the material of the dielectric substrate 1 is FR-4, the relative dielectric constant is 4.4, and the thickness is 1.5 mm.

[0053] In the embodiment, the length of the first rectangular slot 6 is 10 mm, and the width is 3.5 mm.

[0054] In the embodiment, the length of the second rectangular slot 4 is 11.6 mm, and the width is 3 mm; and the length of the third rectangular slot 5 is 11 mm, and the width is 2 mm.

[0055] As shown in FIG. 1, the bottom narrow edge of the first rectangular patch 2 is flush with the edge of the dielectric substrate 1, and is fed through the microwave joint 7. Figure 3As shown in the figure, the utility model based on the above parameters has obtained the relationship curve between the return loss and the frequency of the antenna, the horizontal coordinate is frequency (GHz) and the vertical coordinate is return loss (dB) in the figure; from the figure, it can be seen that the utility model has the following pass frequency bands with return loss lower than -10dB:

[0056] 8.37~10.36GHz, 10.77~11.8GHz, 12.74~13.74GHz, and several narrow pass frequency bands, which achieve the coverage range requirement of multiple frequency bands of X waveband.

[0057] As shown in the figure, the utility model based on the above parameters has obtained the relationship curve between the return loss and the frequency of the antenna, the horizontal coordinate is frequency (GHz) and the vertical coordinate is return loss (dB) in the figure; from the figure, it can be seen that the utility model has the following pass frequency bands with return loss lower than -10dB: Figure 4 Figure 5 As shown in the figure, the utility model based on the above parameters has obtained the relationship curve between the return loss and the frequency of the antenna, the horizontal coordinate is frequency (GHz) and the vertical coordinate is return loss (dB) in the figure; from the figure, it can be seen that the utility model has the following pass frequency bands with return loss lower than -10dB:

[0058] The utility model can cover multiple sub-frequency bands of X waveband and extend to higher frequency bands, realize the super wide band and multi-band design at the same time, and meet the high gain and low reflection loss requirement of the patch antenna.

[0059] The above has carried out the detailed introduction to the multi-frequency band super wide band patch antenna of the utility model for operating in X waveband, the principle and implementation mode of the utility model have been described in the paper by applying specific examples, the above embodiment is only used for helping the method and core idea of the utility model are understood; meanwhile, for the general technical personnel in the field, according to the idea of the utility model, the specific implementation mode and application range will have the change, and the above is described, and the content of the specification should not be understood as the limitation of the utility model.

[0060] In the paper, the relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between the entities or operations. Moreover, the term "include", "contain" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment. Without more limitation, the element defined by the statement "including a" does not exclude the existence of other identical elements in the process, method, article or equipment including the element.​

Claims

1. A multi-band ultra-wideband patch antenna operating in the X-band, characterized in that, include: A dielectric substrate, a first rectangular patch, and a second rectangular patch; wherein, Both the first rectangular patch and the second rectangular patch are mounted on the upper surface of the dielectric substrate along the thickness direction; the first rectangular patch serves as a microstrip feeding unit, and its first narrow side is aligned with the edge of the dielectric substrate; the side of the second rectangular patch is spliced ​​with the second narrow side of the first rectangular patch to form a "T" shaped patch. The second rectangular patch has two first rectangular slots on its side, and a second rectangular slot and two third rectangular slots are formed inside the second rectangular patch; The two first rectangular slots are perpendicular to the side and are symmetrically arranged on both sides of the extension line of the long side of the first rectangular patch. The second rectangular slot is parallel to the side, and the midpoint of the second rectangular slot is located on the central axis of the extension line of the long side of the first rectangular patch. The two third rectangular slots are parallel to the first rectangular slot and located at both ends of the second rectangular slot; the two third rectangular slots are spaced apart from the second rectangular slot to form an "H" shaped layout.

2. The multi-band ultra-wideband patch antenna operating in the X-band according to claim 1, characterized in that, The dielectric substrate has an upper metal coating layer on its upper surface along the thickness direction.

3. A multi-band ultra-wideband patch antenna operating in the X-band according to claim 1, characterized in that, The dielectric substrate has a metal-coated ground plane on its lower surface along the thickness direction.

4. A multi-band ultra-wideband patch antenna operating in the X-band according to claim 3, characterized in that, It also includes a microwave connector; both the metal-coated ground plane and the microstrip feed unit are connected to the microwave connector.

5. A multi-band ultra-wideband patch antenna operating in the X-band according to claim 1, characterized in that, The first rectangular slot, the second rectangular slot, and the third rectangular slot are all hollow slots that penetrate the second rectangular patch along the thickness direction of the second rectangular patch.

6. A multi-band ultra-wideband patch antenna operating in the X-band according to claim 1, characterized in that, The distance between the two first rectangular slots is equal to the width of the narrow side of the first rectangular patch.

7. A multi-band ultra-wideband patch antenna operating in the X-band according to claim 1, characterized in that, The midpoint of the side of the second rectangular patch is located on the central axis of the first rectangular patch; the two first rectangular slots and the two third rectangular slots are symmetrically arranged along the central axis of the extension line of the long side of the first rectangular patch.

8. A multi-band ultra-wideband patch antenna operating in the X-band according to claim 1, characterized in that, The dielectric substrate has a length of 72.5 mm and a width of 52.5 mm; the first rectangular patch has a length of 23 mm and a width of 3 mm; and the second rectangular patch has a length of 29 mm and a width of 24.6 mm.

9. A multi-band ultra-wideband patch antenna operating in the X-band according to claim 8, characterized in that, The first rectangular slot has a length of 10mm and a width of 3.5mm.

10. A multi-band ultra-wideband patch antenna operating in the X-band according to claim 8 or 9, characterized in that, The second rectangular slot has a length of 11.6 mm and a width of 3 mm; the third rectangular slot has a length of 11 mm and a width of 2 mm.

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