CN203481381U

CN203481381U - Navigation antenna

Info

Publication number: CN203481381U
Application number: CN201320007356.9U
Authority: CN
Inventors: 高嵩
Original assignee: ZHENJIANG SOUTH ELECTRONICS CO Ltd
Current assignee: ZHENJIANG SOUTH ELECTRONICS CO Ltd
Priority date: 2013-01-08
Filing date: 2013-01-08
Publication date: 2014-03-12
Anticipated expiration: 2023-01-08

Abstract

The utility model relates to a navigation antenna, which belongs to the technical field of satellite navigation devices. The navigation antenna comprises a radiation device and a feed circuit, the radiation device includes an upper patch, a middle patch, a lower patch and a floor, and the upper patch is connected with the feed circuit by two feed probes. The radiation part of the radiation device is divided into the upper layer, the middle layer and the lower layer, the multiple frequency point operation is achieved by lamination coupling, the dimensions of and the mutual coupling relationships among the upper patch, the middle patch and the lower patch are adjusted to make the three patches respectively work on the frequency bands of the satellite navigation, so as to achieve the antenna multiplexing of the three system frequency bands. Grooves are formed around the patches, so as to achieve the miniaturization of the antenna.

Description

Navigation antenna

Technical field

The utility model belongs to satellite navigation technical field, relates in particular to a kind of satellite navigation aerial.

Background technology

Along with the gradual perfection of the own satellite navigation system of China, only rely on before many application products such as navigation that GPS or GPS/GLONASS carry out, location, time service, measurement will change into gradually with the Big Dipper two on behalf of master, take into account other simultaneously and defend guiding systems.

The hardware change that this transformation relates generally to comprises receiver and terminal reception antenna.With regard to antenna, for different system applies, one side need to become multisystem by original single system, single-frequency point work upgrading, multifrequency point is worked, and needs on the other hand to have different characteristic according to the difference of system applies, as suppressed multipath/broad beam/miniaturization/high accuracy etc.

Navigator fix terminal reception antenna is mainly active antenna, comprises passive bearing portion and active amplifier section.Passive part, according to different designs, can provide different receiving directivity, working band width, and it is also closely related with system receiving sensitivity simultaneously; Active part mainly completes the functions such as low noise amplification to satellite-signal, the outer clutter of filtering frequency band.

The main technique that antenna passive part is made is printed circuit board technology, and its medium substrate is mainly divided into ceramic substrate and microwave base plate.While adopting ceramic substrate, circuit part adopts LTCC or thin-film technique to realize; Adopt microwave base plate can make by general PCB technique.

At present, for the working frequency range of antenna passive part, on market, many products have just been contained GPS frequency range or GPS/GLONASS frequency range, or two generations of the Big Dipper frequency range of being combined with GPS.But perfect along with Chinese satellite positioning system, can take into account multiple satellite navigation system in recent years, realizing the general passive directional antenna that multifrequency point shares becomes inevitable demand.

Utility model content

For above-mentioned technical problem, the purpose of this utility model is to provide a kind of navigation antenna that can simultaneously cover two generations of the Big Dipper, GPS, GLONASS satellite navigation system operating frequency.

For solving the problems of the technologies described above, the technical solution adopted in the utility model is, a kind of navigation antenna, comprise radiation appliance and feed circuit, described radiation appliance comprises upper strata paster, middle level paster, lower floor's paster and floor, between described upper strata paster and feed circuit, by two feed probes, is connected.

The utility model navigation antenna, the radiant section of radiation appliance is divided into three layers of upper, middle and lowers, adopt lamination coupling to realize multifrequency point work, by adjusting the size of upper, middle and lower-ranking paster and coupled relation each other, can make three laminating sheets be operated in respectively the frequency range that satellite navigation is worked, realize the antenna multiplexed of three system frequency ranges.

As the utility model, further improve, the paster surrounding of described radiation appliance has groove, by the fluting in radiation patch, processes, and can realize the miniaturization of antenna.

Accompanying drawing explanation

Fig. 1 is the utility model navigation antenna planar structure schematic diagram;

Fig. 2 is the utility model navigation antenna contour structures schematic diagram.

Embodiment

Below in conjunction with accompanying drawing, the utility model is made and being further illustrated.

As shown in the figure, the utility model navigation antenna comprises upper strata paster 1, middle level paster 2, lower floor's paster 3, floor 4, feed circuit 5 and feed probes 6, between upper strata paster 1 and feed circuit 5, by two feed probes 6, is connected.

Passive directional antenna is mainly comprised of microstrip antenna radiant section and two parts of microstrip broadband feed circuit, wherein at micro-strip paster antenna radiant section, adopts the relatively high pcb substrate of dielectric constant can in small size, realize antenna resonance.Therefore the material that medium 7 adopts is ceramic substrate.Dieelctric sheet radiant section is divided into three layers of upper, middle and lowers, by lamination, is coupled and is realized multifrequency point and work.Paster is processed and can in certain size, be reduced its working frequency range by fluting, has reached the object of antenna miniaturization.It is the parasitic element of upper strata paster that antenna is only received upper strata paster Shang，Er Zhong lower floor paster by a feed probes through the three through hole feedbacks of substrate layer by layer.Topmost one deck is operated in 1.6GHz, and by feed probes direct feed, middle one deck is operated in 1.27GHz, is the first passive unit, by the electromagnetic coupled of upper strata paster, carries out feed, also can be used as the ground of upper strata paster simultaneously; It is the second passive unit that bottom one deck is operated in 1.2GHz, is that the electromagnetic coupled by middle level paster forms feed equally.Consider the bandwidth requirement of 1.6GHz, it is 5mm that its dielectric-slab thickness is set, and the dielectric-slab thickness of lower two layers paster is respectively 2mm and 3mm, and gross thickness is 10mm.By adjusting the size of upper, middle and lower-ranking paster and coupled relation each other, can make three laminating sheets be operated in respectively the frequency range that satellite navigation is worked, realize the antenna multiplexed of three system frequency ranges.Integrated antenna patch size is less than 66mm * 66mm * 10mm.

In order to realize the function of satellite navigation aerial passive part, also need antenna to carry out suitable feed, can form corresponding circular polarization function.The feed circuit of this antenna divides 90 ° of phase shifters to form by 3dB electric bridge and broadband merit.The signal amplitude of two output ports of 3dB electric bridge is equal, and 90 ° of phase phasic differences, are used for realizing the feed of required frequency range to the probe of upper strata paster by feed circuit by two.Broadband merit divides the function of 90 ° of phase shifters the same with 3dB electric bridge, and only working band obtains broadening.1. 1 ~ 1. 6GHz.Broadband merit divides 90 ° of phase shifters to be used for realizing three frequency range circular polarization feeds.

The utility model is based on paster surface fluting technology and use the method for high-k substrate to design a miniaturization circular polarization three frequency microstrip antenna with stacked patch structure.Thereby in limited size, realized the satellite-signal that individual antenna can receive two generations of the Big Dipper, GPS and GLONASS tri-kinds of satellite navigation systems simultaneously.The present invention has realized the multiplexing of satellite navigation aerial, can effectively reduce the use cost of miniaturization navigation antenna, the adaptability that has also improved terminal equipment and compatibility.

The description of above embodiment is comparatively concrete, detailed; but can not therefore be interpreted as the restriction to this patent scope; it should be noted that; for the person of ordinary skill of the art; without departing from the concept of the premise utility; can also make some distortion and improvement, these all belong to protection range of the present utility model.

Claims

1. a navigation antenna, comprises radiation appliance and feed circuit, it is characterized in that: described radiation appliance comprises upper strata paster, middle level paster, lower floor's paster and floor, between described upper strata paster and feed circuit, by two feed probes, is connected.

2. navigation antenna according to claim 1, is characterized in that: the paster surrounding of described radiation appliance has groove.

3. according to navigation antenna described in claim 1 or 2, it is characterized in that: described feed circuit comprises that 3dB electric bridge and broadband merit divide 90 ° of phase shifters.

4. navigation antenna according to claim 3, is characterized in that: the dielectric material that described radiation appliance adopts is ceramic substrate.

5. navigation antenna according to claim 4, is characterized in that: the dielectric-slab thickness of the upper strata paster of described radiation appliance, middle level paster and lower floor's paster is divided into 5mm, 2mm and 3mm.