TWI608656B - Slot antenna with complementary split ring - Google Patents

Description

Slot antenna with complementary split ring

The present invention is a slot antenna having a complementary split ring, and the complementary split resonant ring structure of the antenna miniaturization is achieved by utilizing the complementary split resonant ring structure characteristics.

The antenna is a terminal component in a wireless transmission system. The transmission and reception of information must be done by an antenna. Therefore, the antenna plays a very important role and becomes an indispensable component in wireless communication products. Its characteristics can directly affect its characteristics. The advantages and disadvantages of transmission efficiency, in view of the long-term goal of integration with commercialization in the future, the size of wireless communication equipment has become an important issue that cannot be ignored. How to update and improve the traditional antenna structure and reduce the area to achieve the goal of light, thin, short and small is the focus of antenna design in recent years.

A half-wavelength dipole antenna is a terminal open-circuit two-wire transmission line structure, and its resonant structure is composed of two divided quarter-wavelength lines, so that the structure is simple and has an omnidirectional radiation field. Type, often used in a variety of wireless communication systems.

The Republic of China Patent Publication No. 555169 discloses an improvement of a half-wavelength dipole antenna comprising a coaxial cable and at least two sets of metal conduits of different lengths containing two metal conduits, the metal of the longest metal conduit group The conduits are respectively surrounded by the coaxial cable, one conduit is used for signal radiation, and the other conduit is used as a grounding terminal; the other short metal conduit is installed at the periphery of the long metal conduit group; The end of the two side metal conduits is tightly connected to the coaxial cable exposed between the two metal conduits. This design is designed to achieve the effect of receiving more than two frequency bands, and is widely used in various wireless communications.

The Republic of China Patent Publication No. 461596 discloses a junction-type half-wave dipole antenna which is arranged on a printed circuit board and is formed by a two-half wavelength radiator of a collar type, each of which is The fan-shaped configuration has a length equal to a quarter wavelength, and the inner end of the contraction is connected to the ground plane via a feeding portion; the turbulent portion formed between the two antennas penetrates into the ground plane, and the portion deep into the ground plane is fan-shaped. The matching transmission line is fed from one pole of the antenna to a 90 degree turn after the end point. This design can reduce the size of the choke and reduce the size of the entire antenna. This antenna can also be used in a PCMCIA card.

The Republic of China Patent Publication No. 457741 discloses a planar printed dipole antenna device comprising a substrate and two upper and lower metal layers printed thereon. The upper metal includes a signal strip fed to the microstirp line and a portion of the conductor strip radiating a quarter wavelength; the lower layer metal includes the ground plane of the microstrip line and two extensions of the microstrip line A wavelength conductor has a radiating portion. The signal source is fed by the microstrip line, and the quarter-wavelength conductor strip extending from the upper layer and the two quarter-wavelength conductor strips extended by the ground conductor form a set of dipoles of the half-wavelength oscillating structure ( Dipole), achieve the purpose of antenna radiation.

Since today's communication circuits are required to be thin and light, the two-wire antenna is less likely to be integrated into a planar circuit.

Therefore, how to design an antenna structure that not only meets the needs of light and thin, but also facilitates the integration of planar circuits has become a common expectation of related equipment manufacturers and R&D personnel.

The inventor of the present invention has developed an antenna structure that cannot meet both the requirements of lightness and thinness and the lack of integration of planar circuits, and is actively developing to improve the above-mentioned shortcomings. After continuous trial and effort, the inventors have finally developed this invention.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a slot antenna having a complementary split ring that simultaneously meets the needs of light, thin, and short, and planar circuit integration.

In order to achieve the above object, a slot antenna having a complementary split ring of the present invention includes a dielectric substrate, a ground plane layer, a first complementary split ring resonance unit, a second complementary split ring resonance unit, and a Signal feed unit.

The dielectric substrate has a rectangular shape. The ground plane layer is disposed on the dielectric substrate, the ground plane layer has a first side, a second side, a third side, and a fourth side, and the two sides of the second side Each of the first side edges and one of the third side ends are connected to each other, and the other end of the third side is connected to one end of the fourth side, and the other end of the fourth side is coupled to the other end The other side of the first side is connected, and the first side, the second side, the third side and the fourth side are enclosed in a rectangle.

The first complementary split ring resonance unit is etched from an intermediate portion of the ground plane and has an annular structure and has a first opening, the first opening being located corresponding to the first side of the ground plane layer The first complementary split ring resonance unit has a radiation function.

The second complementary split ring resonance unit is etched from the middle portion of the ground plane, is an annular structure, and has a second opening, the second opening is located corresponding to the third side of the ground plane layer The second opening is located at a position corresponding to the first opening, the second complementary split ring resonance unit is surrounded by and does not contact the first complementary split ring resonance unit, and the second complementary split ring resonance unit is Has a radiation function. The first complementary split ring and the second complementary split ring are in close proximity to each other to create a coupling effect.

The signal feeding unit feeds energy and includes a first vertical structure, a horizontal structure, a second vertical structure and a third vertical structure.

The first vertical structure is elongated, and one end of the first vertical structure is connected to an intermediate portion of the second side, and the other end of the first vertical structure is disposed on a middle portion of the ground plane layer .

The horizontal structure is elongated, and the middle portion of the horizontal structure is connected to the other end of the first vertical structure and has a T-shape, and the horizontal structure is located corresponding to the first opening and the second opening.

The second vertical structure is elongated, and one end of the second vertical structure is coupled to one end of the horizontal structure, and the other end of the second vertical structure faces the fourth side of the ground plane layer.

The third vertical structure is elongated, and one end of the third vertical structure is coupled to the other end of the horizontal structure, and the horizontal structure, the second vertical structure and the third vertical structure are U-shaped.

The first complementary split ring resonance unit and the second complementary split ring resonance unit generate a coupling effect and bend the split ring into a ring shape to achieve antenna miniaturization.

Traditional complementary split ring systems are used as metamaterials, and in microwave circuit or antenna design applications, they are not used as an excited subject, but as an interference structure.

In the present invention, the complementary split ring is used as the excited body as a radiating structure. By the design of the harpoon-type microstrip line, the current directions of the two branches of the microstrip are the same, and the direction of the microstrip branch corresponding to the opening of the complementary split-resonant ring is appropriately designed to excite the complementary split-resonant ring to generate radiation. Furthermore, the coupling effect of the complementary split-resonant ring structure is utilized, and the complementary split ring is bent into a ring shape to achieve antenna miniaturization.

The preferred embodiments of the present invention are described in detail below with reference to the drawings.

Referring to FIG. 1, a slot antenna (1) having a complementary split ring of the present invention includes a dielectric substrate (10), a ground plane layer (11), and a first complementary split ring resonance unit (12). a second complementary split ring resonance unit (13) and a signal feed unit (14).

The dielectric substrate (10) has a rectangular shape. The ground plane layer (11) is disposed on the dielectric substrate (10). The ground plane layer (11) has a first side (110), a second side (111), and a third side. (112) and a fourth side (113), the two ends of the second side (111) are respectively connected to one end of the first side (110) and one end of the third side (112), The other end of the third side (112) is connected to one end of the fourth side (113), and the other end of the fourth side (113) is connected to the other end of the first side (110). The first side edge (110), the second side edge (111), the third side edge (112), and the fourth side edge (113) are enclosed in a rectangle.

The first complementary split ring resonance unit (12) is formed by etching from a middle portion of the ground plane layer (11), is a ring structure, and has a first opening (120), the first opening (120) The position corresponds to the first side (110) of the ground plane layer (11), and the first complementary split ring resonance unit (12) has a radiating function.

The second complementary split ring resonance unit (13) is formed by etching from a middle portion of the ground plane layer (11), has a ring structure, and has a second opening (130), the second opening (130) The position is corresponding to the third side (112) of the ground plane layer (11), and the position of the second opening (130) corresponds to the first opening (120), the second complementary split ring resonance unit ( 13) surrounding and not contacting the first complementary split ring resonance unit (12), and the second complementary split ring resonance unit (13) has a radiation function.

The signal feeding unit (14) feeds energy and includes a first vertical structure (140), a horizontal structure (141), a second vertical structure (142), and a third vertical structure (143).

The first vertical structure (140) is elongated, and one end of the first vertical structure (140) is connected to an intermediate portion of the second side (111), and the other end of the first vertical structure (140) The system is disposed on the middle portion of the ground plane layer (11).

The horizontal structure (141) is elongated, and the middle portion of the horizontal structure (141) is connected to the other end of the first vertical structure (140) and has a T-shape, and the position of the horizontal structure (141) is The first opening (120) and the second opening (130) are corresponding.

The second vertical structure (142) is elongated, one end of the second vertical structure (142) is coupled to one end of the horizontal structure (141), and the other end of the second vertical structure (142) is oriented toward the The fourth side of the ground plane layer (11).

The third vertical structure (143) is elongated, and one end of the third vertical structure (143) is coupled to the other end of the horizontal structure (141), the horizontal structure (141), and the second vertical structure ( 142) and the third vertical structure (143) is U-shaped.

The first complementary split ring resonance unit (12) and the second complementary split ring resonance unit (13) generate a coupling effect and bend the split ring into a ring shape to achieve antenna miniaturization.

In a preferred embodiment of the present invention, the second vertical structure (142) is disposed on the first complementary split ring resonance unit (12) and the second complementary split ring resonance unit (13). The third vertical structure (143) is disposed on the first complementary split ring resonance unit (12) and the second complementary split ring resonance unit (13).

In another preferred embodiment of the present invention, the horizontal structure (141) has a length ranging from 7 mm to 8 mm. In a specific embodiment of the present invention, the horizontal structure (141) has a length of 7.94 mm.

In still another preferred embodiment of the present invention, the second vertical structure (142) and the third vertical structure (143) have a length ranging from 7.5 mm to 8.5 mm, in a specific embodiment of the present invention. The length of the second vertical structure (142) and the third vertical structure (143) is 7.5 mm.

In still another preferred embodiment of the present invention, wherein the horizontal structure (141), the second vertical structure (142), and the third vertical structure (143) have a line width ranging from 0.3 mm to 0.4 mm. In a specific embodiment of the invention, the horizontal structure (141), the second vertical structure (142), and the third vertical structure (143) have a line width of 0.34 mm.

Through the above structure, the complementary split-resonant ring structure of the present invention is responsible for the main radiation, and the harpoon-type microstrip line is responsible for energy feeding, and the harpoon-type microstrip line design makes the current directions of the two branches of the microstrip the same. Properly designing the direction of the microstrip branch corresponding to the complementary split resonant ring opening can excite the complementary split resonant ring to generate radiation. Furthermore, the coupling effect of the complementary split-resonant ring structure is utilized, and the complementary split ring is bent into a ring shape to achieve antenna miniaturization. Moreover, its structural form is not easily reached by those skilled in the art, and it is novel and progressive.

Through the above detailed description, it can fully demonstrate that the object and effect of the present invention are both progressive in implementation, highly industrially usable, and are new inventions not previously seen on the market, and fully comply with the invention patent requirements. , 提出 apply in accordance with the law. The above is only the preferred embodiment of the present invention, and is not intended to limit the scope of the invention. All changes and modifications made in accordance with the scope of the invention shall fall within the scope covered by the patent of the invention. I would like to ask your review committee to give a clear explanation and pray for it.

(1) Slot antenna with complementary split ring (10) Dielectric substrate (11) Ground plane layer (110) First side (111) Second side (112) Third side (113) Fourth side Side (12) first complementary split ring resonance unit (120) first opening (13) second complementary split ring resonance unit (130) second opening (14) signal feed unit (140) first vertical structure (141) Horizontal structure (142) second vertical structure (143) third vertical structure

1 is a schematic view of a slot antenna having a complementary split ring of the present invention.

(1) Slot antenna with complementary split ring (10) Dielectric substrate (11) Ground plane layer (110) First side (111) Second side (112) Third side (113) Fourth side Side (12) first complementary split ring resonance unit (120) first opening (13) second complementary split ring resonance unit (130) second opening (14) signal feed unit (140) first vertical structure (141) Horizontal structure (142) second vertical structure (143) third vertical structure

Claims (10)

A slot antenna having a complementary split ring includes: a dielectric substrate having a rectangular shape; a ground plane layer disposed on the dielectric substrate, the ground plane layer having a first side and a second a side edge, a third side edge and a fourth side edge, the two ends of the second side edge are respectively connected to one end of the first side edge and one end of the third side edge, and the third side edge is another One end is connected to one end of the fourth side, and the other end of the fourth side is connected to the other end of the first side, the first side, the second side, the third side, and The fourth side is surrounded by a rectangle; a first complementary split ring resonance unit is formed by etching from the middle portion of the ground plane layer, is a ring structure, and has a first opening, the first opening Positioned corresponding to the first side of the ground plane layer; a second complementary split ring resonance unit is formed by etching from the middle portion of the ground plane layer, has a ring structure, and has a second opening, The second The position of the mouth corresponds to the third side of the ground plane layer, the position of the second opening corresponds to the first opening, and the second complementary split ring resonance unit surrounds and does not contact the first complementary split ring a resonance unit; and a signal feeding unit, which feeds energy, and includes: a first vertical structure, which is elongated, and one end of the first vertical structure is connected to a middle portion of the second side, the first The other end of a vertical structure is disposed on the middle portion of the ground plane layer; a horizontal structure is elongated, and the middle portion of the horizontal structure is connected to the other end of the first vertical structure and is T a font having a position corresponding to the first opening and the second opening; a second vertical structure having an elongated shape, one end of the second vertical structure being coupled to one end of the horizontal structure, the second The other end of the vertical structure faces the fourth side of the ground plane layer; and a third vertical structure is elongated, and one end of the third vertical structure is coupled to the other end of the horizontal structure. The horizontal structure, the second vertical structure, and the third vertical structure are U-shaped. The slot antenna having a complementary split ring according to claim 1, wherein the first complementary split ring resonance unit and the second complementary split ring resonance unit have a radiating function. The slot antenna having a complementary split ring according to claim 1, wherein the second vertical structure is disposed on the first complementary split ring resonance unit and the second complementary split ring resonance unit The third vertical structure is disposed on the first complementary split ring resonance unit and the second complementary split ring resonance unit. The slot antenna having a complementary split ring according to claim 2, wherein the second vertical structure is disposed on the first complementary split ring resonance unit and the second complementary split ring resonance unit The third vertical structure is disposed on the first complementary split ring resonance unit and the second complementary split ring resonance unit. A slot antenna having a complementary split ring as described in claim 1 or 2 or 3 or 4, wherein the horizontal structure has a length ranging from 7 mm to 8 mm. The slot antenna having a complementary split ring according to claim 1 or 2 or 3 or 4, wherein the second vertical structure and the third vertical structure have a length range of 7.5. From PCT to 8.5 mm. A slot antenna having a complementary split ring according to claim 1 or 2 or 3 or 4, wherein the horizontal structure, the second vertical structure, and the line of the third vertical structure The wide range is from 0.3 mm to 0.4 mm. The slot antenna having a complementary split ring according to claim 5, wherein the horizontal structure, the second vertical structure, and the third vertical structure have a line width ranging from 0.3 mm to 0.4 mm. The slot antenna having a complementary split ring according to claim 6, wherein the horizontal structure, the second vertical structure, and the third vertical structure have a line width ranging from 0.3 mm to 0.4 mm. The slot antenna having a complementary split ring according to claim 7, wherein the horizontal structure, the second vertical structure, and the third vertical structure have a line width ranging from 0.3 mm to 0.4 mm.