CN111799551A

CN111799551A - Miniature patch antenna

Info

Publication number: CN111799551A
Application number: CN202010681795.2A
Authority: CN
Inventors: 杨慧春; 王丽霞; 魏英; 付晓辉; 唐胜春
Original assignee: Beijing Information Science and Technology University
Current assignee: Beijing Information Science and Technology University
Priority date: 2020-07-15
Filing date: 2020-07-15
Publication date: 2020-10-20

Abstract

The invention discloses a micro patch antenna, which comprises: the broken line type radiation patch is positioned on the front surface of the dielectric substrate, and one end of the broken line type radiation patch is connected with the feed part; the edge front loading unit and the edge back loading unit are arranged correspondingly and are respectively positioned on the front and the back of the dielectric substrate, and a spacing groove is formed between the edge front loading unit and the broken-line type radiation patch. The invention adopts the broken line type radiation patch, namely the radiation patch is not the existing plane-shaped radiation patch, and the broken line type radiation patch can increase the perimeter without changing the area of the patch, thereby increasing the current flow path and realizing the miniaturization design; the edge front-side loading patch and the edge back-side loading patch on the front side and the back side improve the current distribution in the antenna, and can reduce the resonant frequency of the antenna or reduce the size of the antenna at the same working frequency, thereby further realizing the miniaturization of the antenna and simultaneously ensuring the stable working frequency band of the miniature patch antenna.

Description

Miniature patch antenna

Technical Field

The invention relates to the technical field of antennas, in particular to a miniature patch antenna.

Background

WLAN is a short for Wireless Local Area Network, is a technology combining Wireless communication and computer Network, is a solution for Wireless data transmission, and can implement mobility of users. WLANs are used in medical, manufacturing, retail, and other industries at their low cost, in flexible networking formats, and to support high-speed data access.

With the proposal of the standard of IEEE802.11b/g (2.4-2.4835 GHz) and the technical progress including antennas, the wireless local area network communication technology is developed rapidly, and the signal intensity of each point can be considered while the whole area is covered. Meanwhile, the demand for WLAN antennas is also increasing, and antennas with small size, light weight and easy conformality are required for wireless network cards of mobile phones and personal computers and various remote sensing devices.

Applications of the wireless local area network are divided into indoor and outdoor, and the following aspects are mainly adopted: point-to-point wireless data transmission; an indoor wireless local area network; the wireless network is in butt joint with a common network; building network connection and long-distance wireless bridging; disaster recovery, temporary connections, etc.

In 2019, a microstrip antenna (strictly winter, gazang, wang, chenjunyu, dongteng, 2.4GHz broadband circularly polarized microstrip antenna) comprising a top radiation patch and a bottom microstrip feeder is designed by people in the strictly winter and the like (J, 2019.34 (3); page 380 plus 389, DOI: 10.23443/j.cjors.2018072001), wide-band coverage of 2.05GHz-3.9 GHz is realized, the antenna has good circularly polarized characteristics, but the size of the antenna is larger, reaches 35mm x 41mm, and is not beneficial to application, for example, the antenna has limitation in integration with an active circuit.

Disclosure of Invention

In order to solve the above problems, the present invention provides a micro patch antenna, which has a simple structure, a small volume, a low cost, and is easy to process and integrate with an active circuit.

In order to achieve the purpose, the invention adopts the following technical scheme:

a micro patch antenna, comprising:

the broken line type radiation patch is positioned on the front surface of the dielectric substrate, and one end of the broken line type radiation patch is connected with the feed part;

the edge front loading unit and the edge back loading unit are arranged correspondingly and are respectively positioned on the front side and the back side of the medium substrate; in the same direction, two ends of the edge front loading unit and two ends of the edge back loading unit which are positioned on different sides are respectively grounded;

the two adjacent sides of the edge front loading unit and the broken line type radiation patch are arranged in parallel at intervals.

In a preferred embodiment of the micro patch antenna according to the present invention, the folded line type radiation patch includes a plurality of strip radiators connected in sequence or a plurality of strip radiators connected to each other.

As a preferred embodiment of the micro patch antenna provided in the present invention, the total effective length of the folded line type radiation patch, wherein,_ris the dielectric constant of the dielectric substrate,fwhich is the center frequency of the antenna,cis constant, and dielectric constant of dielectric substrate_rIt is related.

As a preferred embodiment of the micro patch antenna provided by the invention, the effective total length of the broken line type radiation patch is 9-15 mm.

In a preferred embodiment of the micro patch antenna according to the present invention, the folded line type radiation patch has any one of an L shape, a U shape, a T shape, a frame shape, an M shape, a Z shape, and a V shape in a plan view.

As a preferred embodiment of the micro patch antenna provided by the present invention, the edge front loading unit includes at least two strip front loading patches arranged at intervals; one end of each front loading patch is grounded and serves as a grounding end, and the other end of each front loading patch is an open end; the grounding ends of the adjacent front loading patches are positioned at different sides;

the edge back loading unit comprises at least two strip back loading patches which are arranged at intervals, one end of each back loading patch is grounded and serves as a grounding end, and the other end of each back loading patch is an open end; the grounding ends of the adjacent back loading patches are positioned at different sides;

and in the thickness direction of the dielectric substrate, the grounding ends of the front surface loading patch and the back surface loading patch which are oppositely arranged are positioned at different sides.

As a preferred embodiment of the micro patch antenna provided by the present invention, two adjacent sides of the edge front loading unit and the broken line type radiation patch are parallel to each other and spaced to form a spacing slot;

the gap of the at least two strip-shaped front surface loading patches is communicated with the gap of the open end to form a front S-shaped groove; one end of the front S-shaped groove is communicated with the spacing groove, and the other end of the front S-shaped groove extends to the edge of the medium substrate;

the interval gaps of the at least two strip-shaped back loading patches are communicated with the gap of the open end to form a back S-shaped groove, and one end of the back S-shaped groove extends to the edge of the dielectric substrate.

As a preferred embodiment of the micro patch antenna provided by the present invention, the edge front loading unit and the edge back loading unit are mirror images of each other.

As a preferred embodiment of the micro patch antenna provided by the present invention, the widths of at least two strip-shaped front loading patches of the edge front loading unit are the same or different; the widths of at least two strip-shaped back loading patches of the edge back loading unit are the same or different.

As a preferred embodiment of the micro patch antenna provided in the present invention, the micro patch antenna is configured to use a center frequency range of 2.4-2.48 GHz.

In a preferred embodiment of the micro patch antenna provided by the present invention, the area of the micro patch antenna is (3-7) mm by (3-7) mm.

The invention has the following beneficial effects:

the invention provides a miniature patch antenna, which adopts a broken line type radiation patch, namely a non-existing planar radiation patch, wherein the broken line type radiation patch can increase the perimeter of the patch under the condition of not changing the area of the patch, thereby increasing the current flow path and realizing the miniaturization design; the edge front-side loading patch and the edge back-side loading patch on the front side and the back side improve current distribution in the antenna, and can reduce the resonant frequency of the antenna or reduce the size of the antenna at the same working frequency, so that the miniaturization of the antenna is further realized, and meanwhile, the edge front-side loading patch and the edge back-side loading patch on the front side and the back side can ensure the stable working frequency band of the miniature patch antenna.

Through the slotting design of the spacing slots, the S-shaped slots and the like, the original current path can be blocked, so that the original current path bypasses the slot gaps, the current flow path is increased, and the miniaturization design is facilitated.

The miniature patch antenna has the advantages of simple and compact structure, small size (3-7) mm to (3-7) mm, light weight and small size, is easy to process in a large scale and low in cost, and has the advantage of convenience for integrating with active circuits, such as wireless network cards of mobile phones and personal computers, remote sensing equipment applied to various different occasions and the like.

The return loss of the miniature patch antenna is less than-6 dB in the frequency range of 2.4GHz-2.4835GHz, and the miniature patch antenna has good frequency band-blocking characteristics. The antenna can obtain good gain in the whole frequency band. The pattern has an approximately omnidirectional radiation characteristic over the entire frequency range.

Drawings

Fig. 1 is a schematic structural diagram of a front surface of a micro patch antenna in embodiment 1 of the present invention;

fig. 2 is a schematic structural view of the back surface of the micro patch antenna in embodiment 1 of the present invention;

fig. 3 is a perspective view of a micro patch antenna according to embodiment 1 of the present invention;

fig. 4 is a scattering parameter diagram of the micro patch antenna according to embodiment 1 of the present invention;

FIG. 5 is a 2.45GHz horizontal plane (parallel to the dielectric plate) directional diagram (unit: dB) of the micro patch antenna in accordance with example 1 of the present invention;

fig. 6 is a 2.45GHz vertical (perpendicular to dielectric) plane pattern (in dB) for a patch antenna of miniature embodiment 1 of the present invention.

Detailed Description

Fig. 1-3 are front and back schematic and perspective views of an embodiment of a micro patch antenna according to the present invention. It should be understood that fig. 1, 2 depict simplified examples of micro patch antennas, and that other elements or components may also be included in some implementations of micro patch antennas. Typically, a patch antenna is a single rectangular (or circular) conductive plate spaced above a ground plane.

As shown in fig. 1 to 3, the micro patch antenna includes a dielectric substrate 100, a folded line type radiation patch 200, and an edge front loading unit 400 and an edge back loading unit 600. The broken line type radiation patch 200 is located on the front surface of the dielectric substrate 100, one end of the broken line type radiation patch 200 is connected with the feeding portion 300, and the other end is open-circuited and set as an open-circuited end; the edge front loading unit 400 and the edge back loading unit 600 are correspondingly arranged and respectively located on the front and the back of the dielectric substrate 100; in the same direction, two ends of the edge front loading unit 400 and the edge back loading unit 600 on different sides are grounded respectively, so that the front and the back of the two are correspondingly arranged to form a loading effect similar to a capacitor, and the size of the antenna can be effectively reduced; further, two adjacent sides of the edge front loading unit 400 and the broken line type radiation patch 200 are arranged in parallel and at intervals, so that a loading effect is formed through electric field coupling.

The folded radiating patch 200 is used to generate the main resonance of the micro patch antenna. In some embodiments, the broken line type radiation patch 200 includes a plurality of strip radiators connected in sequence, for example, two strip radiators are connected in sequence to form an L-shaped, V-shaped, or T-shaped radiation patch 200 in a top view; for example, three strip radiators are connected in sequence to form a U-shaped, M-shaped, or Z-shaped radiation patch 200, and for example, four strip radiators are connected in sequence to form a non-enclosed loop-shaped or frame-shaped radiation patch 200, it should be noted that, without being limited to the above radiation patches 200 in various shapes, regardless of the shapes, one of the strip radiators in each radiation patch 200 in various shapes is adjacent to and spaced in parallel from the

front loading patches

410 and 420 of the edge front loading unit 400 to form the spacing slot 500, preferably, the center line of the adjacent strip radiators and the center line of the front loading patches are spaced in parallel. It should be understood that other embodiments of the meander-line radiating patch 200 may include more or fewer strip radiators forming a non-intersecting, non-enclosed, generally meander-line shaped radiating patch 200. Furthermore, the connected strip radiators can be in a perpendicular relation or an acute angle relation or an obtuse angle relation, and a transition angle between the connected strip radiators can be chamfered.

The fold-line radiating patch 200 has an effective overall length, wherein,_ris the dielectric constant of the dielectric substrate 100,fwhich is the center frequency of the antenna,cis constant, and the dielectric constant of the dielectric substrate 100_rIt is related. Taking the U-shaped radiation patch 200 as an example, the effective total length is the sum of the lengths of three sections of strip radiators, and taking the T-shaped radiation patch 200 as an example, the effective total length is the sum of the lengths of a vertical strip radiator and a half of a horizontal strip radiator. It can be understood that the effective total length is about the length of a connection line between the feeding end and the opening end, and preferably, the effective total length is controlled to be 9-15 mm, so that the design of the size of the miniaturized antenna is met, and the application requirement of the antenna frequency band is met.

The edge front loading unit 400 includes at least two strip

front loading patches

410 and 420, which may be two, three, four, etc., and are spaced from each other; one end of each of the front loaded

patches

410 and 420 is grounded as a ground terminal, and the other end is an open end; the ground terminals adjacent the front loaded

patches

410, 420 are on different sides. In some embodiments, the front loaded patch 410,420 is a transverse rectangular patch, and in some embodiments, the front loaded patch 410,420 is a variable width patch,

the above and below alternate arrangement and the horizontal arrangement of each

front loading patch

410, 420 are taken as examples to further illustrate that the ground terminals of the adjacent

front loading patches

410, 420 are located at different sides, the left open circuit of the upper

front loading patch

410, 420 is an open circuit end and has an open circuit gap, the right ground is a ground terminal (can be directly connected to the ground plane of the dielectric substrate 100), the right open circuit of the lower

front loading patch

410, 420 is an open circuit end and has an open circuit gap, and the left ground is a ground terminal (can be directly connected to the ground plane of the dielectric substrate 100). It will be appreciated that adjacent

front loading patches

410, 420 are arranged in an off-axis manner, i.e., with non-coincident centerlines or central axes.

Further, the gap between the at least two strip-shaped front-

loading patches

410 and 420 is communicated with the gap at the open end to form a front S-shaped groove; one end of the front surface S-shaped groove is communicated with the spacing groove 500, and the other end extends to the edge of the dielectric substrate 100.

Correspondingly, the edge backside loading unit 600 includes at least two strip-shaped

backside loading patches

610 and 620, which may be two, three, four, etc., and are disposed at intervals; one end of each of the

back loading patches

610 and 620 is grounded as a ground end, and the other end is an open end; the ground terminals of adjacent back-loaded

patches

610, 620 are located on different sides; in the thickness direction of the dielectric substrate 100, the grounding ends of the front loaded

patches

410 and 420 and the back loaded

patches

610 and 620 that are oppositely arranged are located at different sides, and if they are located at the same side, a loading effect similar to a capacitor cannot be formed. In some embodiments, the back-loaded

patch

610, 620 is a transverse rectangular patch, and in some embodiments, the back-loaded

patch

610, 620 is a variable width patch.

The upper and lower spacing arrangements, and the lateral arrangement of each of the

back loading patches

610 and 620 further illustrate that the ground terminals of the adjacent

back loading patches

610 and 620 are located at different sides, the open circuit at the right end of the upper

back loading patch

610 and 620 is an open circuit end and has an open circuit gap, the ground at the left end is a ground terminal (which can be directly connected to the ground plane of the dielectric substrate 100), the open circuit at the left end of the lower

back loading patch

610 and 620 is an open circuit end and has an open circuit gap, and the ground at the right end is a ground terminal (which can be directly connected to the ground plane of the dielectric substrate 100). It will be appreciated that adjacent ones of the back-loaded

patches

610, 620 are arranged in an off-axis manner, i.e., with non-coincident centerlines or central axes.

Further, the gap between the at least two strip-shaped

back loading patches

610 and 620 is communicated with the open-circuit gap at the open-circuit end to form a back S-shaped slot, and one end of the back S-shaped slot extends to the edge of the dielectric substrate 100.

More preferably, the edge front loading unit 400 and the edge back loading unit 600 are mirror images of each other, and it can be understood that, taking the edge of the media substrate 100 as an axis, the front and the back thereof are rotated and unfolded to be in the same plane, and then the shape of the edge front loading unit 400 and the shape of the edge back loading unit 600 are mirror images.

The widths of the at least two strip-shaped

front loading patches

410 and 420 of the edge front loading unit 400 are the same or different; the widths of the at least two strip-shaped backside-loading

patches

610 and 620 of the edge backside-loading unit 600 are the same or different. It is understood that in particular implementations, the widths of the

strip radiators

210, 220, 230, the front loaded

patches

410, 420, the back loaded

patches

610, 620, the spacing slots, the open slots, and the spacing slots 500 may be adjusted to optimize antenna performance.

It should be noted that the widths of all the

strip radiators

210, 220, 230 of the folded line type radiating patch 200 may be the same or different, and the width of each of the

strip radiators

210, 220, 230 may be fixed, such as a linear rectangular shape, or may be variable, such as a non-linear saw-tooth shape. The width of the

front loading patches

410, 420 may be fixed, such as linear rectangular, etc., or may be variable, such as non-linear saw tooth, etc. The width of the

back loading patches

610, 620 may be fixed, such as linear rectangular, etc., or may be variable, such as non-linear saw tooth, etc.

The micro patch antenna may be implemented on a dielectric substrate 100, including but not limited to RF4 dielectric substrate 100, using copper or any other Radio Frequency (RF) host material. It is understood that the material of the folded radiating patch 200, the

front loading patches

410, 420 and the

back loading patches

610, 620 is copper or any other Radio Frequency (RF) host material. In a specific implementation, the zigzag radiation patches 200, the front loaded

patches

410 and 420, and the back loaded

patches

610 and 620 may be printed on the dielectric substrate 100, or the zigzag radiation patches 200, the front loaded

patches

410 and 420, and the back loaded

patches

610 and 620 may be etched on the dielectric substrate 100 coated with copper, but not limited thereto.

In certain embodiments, the micro patch antenna uses a center frequency of 2.4GHz-2.4835 GHz. This frequency range represents the frequency range currently used by the IEEE802.11 Wi-Fi and IEEE802.15.1 Bluetooth specifications. In particular implementations, the absolute bandwidth may be variable depending on the scalability of the center frequency used by the miniature patch antenna.

The antenna length is typically 1/4 using a frequency wavelength, at a frequency of 2.4GHz and a wavelength of 12.5cm, and the length of the conventional patch antenna is about 30mm, which is consistent with the dimensions described in the background. Through reasonable structural change, front and back loading design and slotting design, the structure of the whole patch antenna is more compact, the whole size is optimized to be extremely small and can reach (3-7) mm, the size of the patch antenna is greatly reduced, meanwhile, the return loss of the miniature patch antenna is less than-6 dB in the frequency range of 2.4GHz-2.4835GHz, the miniature patch antenna has good frequency band blocking characteristic, the antenna can obtain good gain in the whole frequency band, a directional diagram has approximately omnidirectional radiation characteristic (as shown in figures 5-6) in the whole frequency range, the application requirement is met, and the miniature patch antenna is unexpected for the inventor.

The miniature patch antenna of the present invention is expandable. Generally, the width and length of a micro patch antenna are determined by the center frequency and the center wavelength. As described above, the micro patch antenna may be tuned to a center frequency of 2.4GHz, and other center frequencies and center wavelengths may be used, i.e., the actual dimensions of the length and width of the micro patch antenna are scaled up or down (the ratio of center wavelength to center frequency remains the same) as the configured center frequency and center wavelength are changed. For example, the micro-patch antenna is reduced to one tenth of the size, such that the micro-patch antenna is operable at ten times the frequency, while all other characteristics of the micro-patch antenna remain the same.

In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

As shown in fig. 1 to 3, the present embodiment shows a micro patch antenna, which includes an FR4 dielectric substrate 100, a broken line type radiation patch 200, an edge front loading unit 400, and a feeding portion 300, which are located on the front surface of the FR4 dielectric substrate 100, and an edge back loading unit 600 located on the back surface of the FR4 dielectric substrate 100, wherein the micro patch antenna is designed to have a size of 5mm by 5mm, and is printed on a dielectric constant of the micro patch antenna_r=4.4, loss tangenttanFR4 dielectric substrate 100 is 20mm × 1mm in size on FR4 dielectric substrate 100 of =0.02, that is, the micro patch antenna is a spacer 110 of 5mm × 5mm formed at an interval on FR4 dielectric substrate 100, and the ground plane of dielectric substrate 100 is outside spacer 110, it can be understood that when the antenna is formed by a printing process, the space inside spacer 110 is a blank space before the micro patch antenna is formed, that is, a pure dielectric substrate surface without copper cladding; when an etching process is used to form the antenna, the non-antenna area within the spacer 110 is etched away.

The micro patch antenna of the present embodiment is located at the lower edge of the FR4 dielectric substrate 100, and it can be understood that the micro patch antenna can also be located at the left edge, the right edge, or the upper edge of the FR4 dielectric substrate 100.

The broken line type radiation patch 200 is formed by sequentially connecting three

strip radiators

210, 220 and 230 to form a U shape, wherein the strip radiator 220 and the front loading patch 410 are arranged in parallel at intervals to form a spacing groove 500; further, the feeding unit 300 is connected to one end of the U-shaped radiation patch, and the feeding unit 300 is a microstrip line having an impedance of 50 Ω. In this embodiment, the effective total length of the broken-line type radiation patch 200 is controlled to be 12-15 mm.

Specifically, the widths w1=0.3mm of the three

band radiators

210, 220, 230, and the lengths of the first to

third band radiators

210, 220, 230 are L1=2.9mm, L2=4mm, and L3=3.1mm, respectively.

The edge front loading unit 400 includes two strip-shaped front loading patches, namely an upper front loading patch 410 and a lower front loading patch 420, where the length L4=4.9mm and the width W2=0.53mm of the upper front loading patch 410, the width W3=0.62mm of the spacer slot 500 between the upper front loading patch 410 and the second strip radiator 220, the distance (i.e., open gap) g1=0.1mm from the edge of the spacer 110 at the left end of the upper front loading patch 410, and the right end extends to the edge of the spacer 110 and is directly connected to the ground plane; the length L5=4.9mm and the width W4=0.1mm of the lower front loading patch 420, the width (i.e. the spacing gap) W5=0.15mm of the slot between the lower front loading patch 420 and the upper front loading patch 410, the lower end of the lower front loading patch 420 is flush with the edge of the dielectric substrate 100, the distance (i.e. the open gap) g2=0.1mm from the edge of the spacer 110 at the right end of the lower front loading patch 420, and the left end extends to the edge of the spacer 110 and is directly connected to the ground plane.

The edge backside loading unit 600 includes two strip-shaped backside loading patches, namely an upper backside loading patch 610 and a lower backside loading patch 620, where the length L6=4.9mm and the width W6=0.53mm of the upper backside loading patch 610, the distance (i.e., open gap) g3=0.1mm from the edge of the spacer 110 at the right end of the upper backside loading patch 610, and the left end extends to the edge of the spacer 110 and is directly connected to the ground plane; the length L7=4.9mm and the width W7=0.1mm of the lower backloaded patch 620, the width (i.e., the spacing gap) W8=0.15mm of the slot between the lower backloaded patch 620 and the upper backloaded patch 610, the lower end of the lower backloaded patch 620 is flush with the edge of the dielectric substrate 100, the distance (i.e., the open gap) g4=0.1mm from the edge of the spacer 110 at the left end of the lower backloaded patch 620, and the right end extends to the edge of the spacer 110 to be directly connected to the ground plane.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

It is to be understood that the above-described embodiments are merely illustrative of some, but not restrictive, of the broad invention, and that the appended drawings illustrate preferred embodiments of the invention and do not limit the scope of the invention. This application is capable of embodiments in many different forms and is provided for the purpose of enabling a thorough understanding of the disclosure of the application. Although the present application has been described in detail with reference to the foregoing embodiments, it will be apparent to one skilled in the art that the present application may be practiced without modification or with equivalents of some of the features described in the foregoing embodiments. All equivalent structures made by using the contents of the specification and the drawings of the present application are directly or indirectly applied to other related technical fields and are within the protection scope of the present application.

Claims

1. A micro patch antenna, comprising:

2. The micro patch antenna as claimed in claim 1, wherein the meander line type radiation patch comprises a plurality of strip radiators connected in sequence or a plurality of strip radiators connected to each other.

3. The micro patch antenna as claimed in claim 2, wherein the effective total length of the folded line type radiating patch is 9-15 mm.

4. The micro patch antenna according to any one of claims 1 to 3, wherein the folded line type radiation patch shape is any one of an L-shape, a U-shape, a T-shape, a frame-shape, an M-shape, a Z-shape and a V-shape in a plan view.

5. The micro patch antenna according to claim 1, wherein the edge front loading unit comprises at least two strip-shaped front loading patches arranged at intervals; one end of each front loading patch is grounded and serves as a grounding end, and the other end of each front loading patch is an open end; the grounding ends of the adjacent front loading patches are positioned at different sides;

6. The micro patch antenna according to claim 5, wherein two adjacent sides of the edge front loading unit and the broken line type radiation patch are parallel to each other and spaced to form a spacing groove;

7. The micro patch antenna of claim 1, 5 or 6, wherein the edge front loading unit and the edge back loading unit are mirror images of each other.

8. The micro patch antenna according to claim 1, 5 or 6, wherein the widths of at least two strip-shaped front loading patches of the edge front loading unit are the same or different; the widths of at least two strip-shaped back loading patches of the edge back loading unit are the same or different.

9. The micro patch antenna according to claim 1, wherein the micro patch antenna is configured to use a center frequency range of 2.4-2.48 GHz.

10. The micro patch antenna according to claim 1, wherein the micro patch antenna has an area of (3-7) mm by (3-7) mm.