CN203056102U

CN203056102U - microstrip slot antenna

Info

Publication number: CN203056102U
Application number: CN 201320023464
Authority: CN
Inventors: 程秀洋; 孙绪保
Original assignee: Shandong University of Science and Technology
Current assignee: Shandong University of Science and Technology
Priority date: 2013-01-17
Filing date: 2013-01-17
Publication date: 2013-07-10
Anticipated expiration: 2023-01-17

Abstract

The utility model discloses a microstrip slot antenna. The microstrip slot antenna comprises a medium substrate; a microstrip feed line attached to one side surface of the medium substrate; a ground plate attached to the other side surface of the medium substrate and provided with radiation slots, wherein the radiation slots comprise a first radiation slot in a semicircular shape; two second radiation slots in L-shaped structures respectively connected with two ends of the straight edge of the first radiation slot; and a third radiation slot in a semicircular shape which wraps the outer side of the first radiation slot, the straight edge of the first radiation slot and the straight edge of the third radiation slot are arranged on the same straight line, and the first radiation slot is separated from the third radiation slot by the semicircular ground plate with a certain width. The microstrip slot antenna can normally work in the frequency range of 2.4GHz and 5.8GHz, and facilitates to solve the technical problems in the prior art that the bandwidth of small to medium-sized antennas is narrow, and the gain is low.

Description

Microstrip slot antenna

Technical field

The utility model relates to a kind of antenna, particularly a kind of microstrip slot antenna.

Background technology

Microstrip antenna, be last century the seventies study successful a kind of novel antenna.This antenna have aircraft surface syntype simple in structure, in light weight, depressed install, and can with the integrated technological merit of microstrip circuit, be widely used in fields such as communication, radar.At present, along with the development of frequency modulation, spread spectrum technic in China's military affairs, electronic communication, the mobile communication, the status of microstrip antenna is more and more important.

Microstrip antenna is to utilize the slit open on ground plate, by the microstrip line of dielectric substrate opposite side or other feeder line (as the line of rabbet joint) antenna to its feed.In fact the crack can be Any shape, but only the shape in some basic little band cracks is studied usually, as rectangle crack, ring shake, straight-flanked ring crack and taper crack.Therefore leaky antenna can be referred to as the bidirectional radiation device in the radiation of the both sides in their cracks.Utilize the reflector panel on the side in crack, just can obtain the one-way radiation device.

WLAN is the abbreviation of Wireless Local Area Network, refers to that the employing wireless communication technology is interconnected with computer equipment, and the network system of resource-sharing can be communicated by letter and realize to formation mutually.The characteristics of WLAN (wireless local area network) essence are not re-use telecommunication cable computer and network is coupled together, but connect by wireless mode, thereby make the movement of the structure of network and terminal more flexible.WLAN (wireless local area network) based on the IEEE802.11 standard allows to use in LAN environment 2.4GHz or 5.8GHz radio-frequency range in the ISM band that can authorize to carry out wireless connections.

The fast development of WLAN has obtained extensive use in occasions such as hospital, factory and schools.Along with popularizing of open popular and handheld device of handling official business, people are more and more to the needs of mobility visit and storage information, thereby WLAN will obtain in fields such as office, production and families to use widely, but how be integrated into each frequency range of WLAN (wireless local area network) on the wireless devices and reach very little size, the WLAN antenna has been proposed new higher requirement.People are mainly reflected in the wider of frequency range to the requirement of WLAN antenna, volume is littler, be convenient to install and set up and carry, higher frequency is arranged simultaneously, yet in low-frequency range, traditional half-wavelength antenna size is too big, after the too narrow and miniaturization of bandwidth because swept area is little, make bandwidth narrower, gain diminishes, and then has restricted its application.

The utility model content

The purpose of the utility model embodiment is to propose a kind of microstrip slot antenna, can satisfy the operate as normal in 2.4GHz and 5.8GHz frequency range, is beneficial to solve technical problems such as the middle-size and small-size beamwidth of antenna of prior art is narrow, gain is low.

To achieve these goals, the utility model adopts following technical scheme:

Microstrip slot antenna comprises:

Medium substrate;

Microstrip feed line is attached on the side surface of described medium substrate, is strip structure, is used for the feed-in electromagnetic wave signal;

Ground plate is attached on the opposite side surface of described medium substrate, and ground plate is provided with the radiating slot for the radiated electromagnetic wave signal, comprising:

First radiating slot, the semicircular in shape shape;

Second radiating slot has two, is connected to the position, both ends at the straight flange edge of described first radiating slot respectively mutually, and each second radiating slot is L-shaped structure all;

The 3rd radiating slot, be the semicircular ring shape, be wrapped in the outside of described first radiating slot, the straight flange edge of first radiating slot and the straight flange edge of the 3rd radiating slot are on same the straight line, separate by the semi-round ring shape ground plate with certain width between first radiating slot and the 3rd radiating slot.

Preferably, described medium substrate, adopting dielectric constant is that 4.4 epoxy plate material is made.

Preferably, described microstrip feed line, ground plate be rotten being engraved on the side surface of described medium substrate respectively, is that copper product makes.

Compared with prior art, the utlity model has following advantage:

(1) microstrip slot antenna of the present utility model, can be implemented in communicating by letter on 2.4GHz and the 5.8GHz frequency range well, and all less than-10dB, standing-wave ratio is respectively 1,0.8 and all satisfies wireless job requirement less than 2 the return loss of antenna on 2.4GHz and 5.8GHz frequency range;

(2) microstrip slot antenna of the present utility model, the bandwidth on two frequency ranges is respectively 100MHz and 750MHz, finely satisfies at the bandwidth requirement of WLAN antenna on two frequency ranges;

(3) microstrip slot antenna of the present utility model is 3.5dB in the gain of 2.4GHz frequency range, reaches 9.7dB in the gain of high band 5.8GHz frequency range, has higher gain, is beneficial to the problem that solves traditional antenna low gain in the prior art.

Description of drawings

Fig. 1 is the vertical view of microstrip slot antenna among the utility model embodiment;

Fig. 2 is the end view of microstrip slot antenna among the utility model embodiment;

Fig. 3 is the upward view of microstrip slot antenna among the utility model embodiment;

Fig. 4 is the dimensional drawing of microstrip slot antenna among the utility model embodiment;

Fig. 5 is the return loss resolution chart of microstrip slot antenna among the utility model embodiment;

Fig. 6 is the standing-wave ratio resolution chart of microstrip slot antenna among the utility model embodiment;

Fig. 7 is the antenna gain pattern of microstrip slot antenna among the utility model embodiment.

Embodiment

Below in conjunction with accompanying drawing and embodiment the utility model is described in further detail:

In conjunction with shown in Fig. 1 to 3, microstrip slot antenna comprises:

Medium substrate 1;

Microstrip feed line 2 is attached on the side surface of described medium substrate 1, is strip structure, is used for the feed-in electromagnetic wave signal;

Ground plate 3 is attached on the opposite side surface of described medium substrate 1, and ground plate is provided with the radiating slot for the radiated electromagnetic wave signal, comprising:

First radiating slot 4, the semicircular in shape shape is for generation of high frequency 5.8GHz frequency range;

Second radiating slot 5 has two, is connected to the position, both ends at the straight flange edge of described first radiating slot respectively mutually, and each second radiating slot is L-shaped structure all, for generation of low frequency 2.4GHz frequency range; Further, second radiating slot 5 and described first radiating slot, 4 vertical connections.

The 3rd radiating slot 6, be the semicircular ring shape, be wrapped in the outside of described first radiating slot, the straight flange edge of first radiating slot and the straight flange edge of the 3rd radiating slot are on same the straight line, separate by the semi-round ring shape ground plate with certain width between first radiating slot and the 3rd radiating slot, be used for regulating impedance matching and the resonance frequency of antenna.In addition, microstrip feed line 2 also can be used for regulating Antenna Impedance Matching.

Preferably, described medium substrate 1, adopting dielectric constant is that 4.4 epoxy plate material is made.

Preferably, described microstrip feed line 2, ground plate 3 be rotten being engraved on the side surface of described medium substrate 1 respectively, and be that copper product makes.

Fig. 4 shows the concrete parameter designing value of microstrip slot antenna among the utility model embodiment, to satisfy the microstrip slot antenna operate as normal at the needs of 2.4GHz and 5.8GHz.Wherein, the length of microstrip feed line 2 is 22mm, and width is 3mm, and characteristic impedance is 50 Ω.

Fig. 5 to Fig. 7 shows the resolution chart to microstrip slot antenna.By resolution chart as can be known, microstrip slot antenna in the return loss of 2.4GHz and 5.8GHz frequency range all less than-10dB; Standing-wave ratio is respectively 1,0.8 all less than 2 job requirements of satisfying antenna; And antenna is respectively 100M and 750M satisfies the WLAN antenna at the bandwidth requirement of two frequency ranges in the bandwidth of two frequency ranges; Antenna is 3.5dB in the gain of 2.4GHz frequency range, meets the demands, and reaches 9.7dB in the gain of high frequency 5.8GHz frequency range, and very high gain is arranged, and has solved the problem of small size antenna low gain well.

Certainly; more than explanation only is preferred embodiment of the present utility model; the utility model is not limited to enumerate above-described embodiment; should be noted that; any those of ordinary skill in the art, under the instruction of this specification, alternative, obvious variant that all that make are equal to; all drop within the essential scope of this specification, ought to be subjected to protection of the present utility model.

Claims

1. Microstrip slot antenna, characterized in that, comprising:

Dielectric substrate;

The microstrip feeder is attached to one side surface of the dielectric substrate and has a long strip structure;

The ground plate is attached to the other side surface of the dielectric substrate, and a radiation slot for radiating electromagnetic wave signals is arranged on the ground plate, including:

The first radiating slot is in the shape of a semicircle;

There are two second radiating slots, respectively connected to the two ends of the straight edge of the first radiating slot, and each second radiating slot has an L-shaped structure;

The third radiating slit is in the shape of a semi-circle and wraps around the outside of the first radiating slit, the straight edge of the first radiating slit is on the same straight line as the straight edge of the third radiating slit, and the first radiating slit and the straight edge of the third radiating slit The third radiation slots are separated by a semi-circular ground plate with a certain width.

2. The microstrip slot antenna according to claim 1, wherein the dielectric substrate is made of epoxy board material with a dielectric constant of 4.4.

3 . The microstrip slot antenna according to claim 1 , wherein the microstrip feeder and the grounding plate are respectively etched on one side surface of the dielectric substrate, both of which are made of copper material. 4 .