CN217788129U - Miniaturized choke coil applied to back of antenna - Google Patents

Abstract

The embodiment of the utility model discloses be applied to miniaturized choke at the antenna back, including the inner core, be provided with a plurality of circular shape chokes by supreme equidistant lower on the inner core, each choke all is coaxial with the inner core, forms the choke groove between the upper and lower adjacent choke, echelonment is constituteed in adjacent choke groove. The utility model discloses can the direct mount at the antenna back, its is small, and light in weight can not influence the orofacial area of former antenna, nevertheless can provide good anti multipath ability to widen the range of application of choke antenna, reduced the cost of choke antenna simultaneously.

Description

Miniaturized choke coil applied to back of antenna

Technical Field

The utility model relates to a navigation technology field especially relates to a be applied to miniaturized choke coil at the antenna back.

Background

Global satellite navigation system refers to space based radio navigation positioning system that provides users with all weather 3-dimensional coordinates and velocity and time information at any location on the earth's surface or near-earth space, the principle being that the satellite-to-user distance measurement is based on the difference between the time of transmission of the satellite signals and the time of arrival at the receiver, called pseudorange, which requires the reception of at least signals from 4 satellites in order to calculate the three-dimensional position of the user and the receiver clock bias. With the development of global integration, satellite navigation systems are applied in various fields such as aviation, automobile navigation, communication, mapping, entertainment and the like.

Currently, there are four major satellite positioning systems around the world: the Global Positioning System (GPS) in the united states, the global navigation satellite system (GLONASS) in russia, the galileo satellite positioning system in the european space agency, and the beidou navigation satellite positioning system in china.

With the continuous development of satellite navigation technology, satellite navigation precision measurement technology has been widely applied in many fields, the quality of a measurement type antenna directly affects the measurement precision of a satellite navigation receiver, and the multipath effect and the change of a phase center of the measurement type antenna are main reasons affecting the performance of the measurement type antenna.

When the signal meets obstacles such as mountains, lake buildings, vehicles and the like in the propagation process, the signal can be reflected or scattered. These signals, when arriving at the receiver, travel a longer path than the direct signal, known as multipath signals. Multipath signals are always delayed with respect to the direct signal and may have attenuated or enhanced amplitudes. When multipath signals and direct signals enter a receiver at the same time, the amplitude and phase relations of the multipath signals and the direct signals are mutually superposed, errors or distortions can be caused in pseudo-range measurement and carrier phase measurement, the ranging precision is reduced, and the receiver can be completely unlocked.

The specific methods for attenuating the multipath influence mainly include selecting a suitable receiving environment, using a receiver with a multipath cancellation technique, using an antenna having a multipath suppression effect function, and the like. When the delay of the multipath signal is large, the receiver using the multipath removing technique can remove the error, but when the delay is small, the receiver can hardly remove the error, and in this case, an antenna having a multipath suppressing effect, such as a choke antenna, or the like, can be used.

The antenna choke coil is a substrate structure composed of a plurality of concentric circular grooves with certain depth and used as an antenna connecting bottom plate, the number of the concentric circular grooves is generally 3 to 5, the groove depth is generally about 1/4 wavelength, so that the surface of the choke coil presents high impedance characteristics, surface waves are prevented from being formed on the surface of the choke coil, the gain distribution of the antenna is changed, the backward gain and the low elevation gain of the antenna are reduced, and the effect of inhibiting multipath effects is achieved.

The traditional choke is additionally arranged around the antenna reflection cavity and consists of a plurality of concentric circular grooves. The number of concentric grooves is generally 3 to 5, and the groove depth is generally about 1/4 wavelength.

The choke is too large in size, usually made of metal, high in cost and heavy in weight, and the cost and installation of the measuring antenna with the choke are seriously affected.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a technical problem that will solve provides a miniaturized choke coil of being applied to the antenna back to reduce the volume, weight reduction widens the range of application of antenna, simultaneously reduce cost.

In order to solve the technical problem, the embodiment of the utility model provides a be applied to miniaturized choke at the antenna back, including the inner core, be provided with a plurality of circular shape chokes by lower supreme equidistant on the inner core, each choke all is coaxial with the inner core, forms the choke groove between the upper and lower adjacent choke, the echelonment is constituteed to adjacent choke groove.

Further, the inner core and the choke coil are made of metal materials.

Further, the number of the choke grooves is more than or equal to 1 and less than or equal to 4.

Furthermore, a reflecting cavity is arranged at the top of the inner core.

Further, the choke coils are the same thickness.

The utility model has the advantages that:

1. the utility model discloses a set up from top to bottom a plurality of chokes, stack from top to bottom in the choke groove that forms between the adjacent choke, and need not to extend to the periphery, just so reduced the whole diameter of choke greatly.

2. The utility model discloses combined echelonment choke groove to accomplish the back radiation suppression of antenna jointly on the basis of vertical choke coil. The effect of the vertical choke of the utility model on the back radiation inhibition of the antenna is improved while the overall diameter of the choke is reduced,

3. the size and weight of the choke coil are reduced, and the cost and installation cost of the measuring antenna are reduced.

Drawings

Fig. 1 is a perspective view of a miniaturized choke coil applied to the back surface of an antenna according to an embodiment of the present invention.

Fig. 2 is a sectional view of a miniaturized choke coil applied to the back surface of an antenna according to an embodiment of the present invention.

Fig. 3 is a side view of a miniaturized choke applied to the back of an antenna according to an embodiment of the present invention.

Fig. 4 is a perspective view of another angle of the miniaturized choke coil applied to the back surface of the antenna according to the embodiment of the present invention.

Description of the reference numerals

The antenna comprises an antenna 1, a reflection cavity 2, an inner core 3, a choke coil 4 and a choke groove 5.

Detailed Description

It should be noted that, in the present application, the embodiments and features of the embodiments may be combined with each other without conflict, and the present invention is further described in detail with reference to the accompanying drawings and specific embodiments.

In the embodiment of the present invention, if there is a directional indication (such as upper, lower, left, right, front, and rear \8230;) only used to explain the relative position relationship between the components and the motion situation under a specific posture (as shown in the attached drawings), if the specific posture is changed, the directional indication is changed accordingly.

In addition, the descriptions of the first, second, etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying any relative importance or implicit indication of the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.

Referring to fig. 1 to 4, a miniaturized choke coil applied to a back surface of an antenna according to an embodiment of the present invention includes an inner core. The utility model discloses can the direct mount at the antenna back, its is small, and light in weight can not influence the orofacial area of former antenna, nevertheless can provide good anti multipath ability to widen the range of application of choke antenna, reduced the cost of choke antenna simultaneously.

A plurality of circular choking coils are arranged on the inner core at equal intervals from bottom to top. The utility model discloses a set up from top to bottom a plurality of chokes, the choke groove that forms between the adjacent choke is stacks from top to bottom, and need not to extend to the periphery, has just so reduced the whole diameter of choke greatly.

Each choke coil is coaxial with the inner core, and a choke groove is formed between the upper and lower adjacent choke coils and is formed into a step shape. The vertical choke is combined with a step-shaped choke groove to complete the back radiation suppression of the antenna. The stepped choke groove improves multipath suppression of the GNSS full-band antenna.

In one embodiment, the inner core and the choke coil are made of metal materials. In specific implementation, the metal material can be replaced by a scheme of electroplating after injection molding.

In one embodiment, the number of the choke grooves is 1 or more and 4 or less.

In one embodiment, the core and the choke coil may be integrally formed by casting or die casting, or may be separately assembled.

In one embodiment, a reflective cavity is formed on the top of the inner core.

In one embodiment, the chokes are of the same thickness.

The width and depth of the choke groove can be adjusted according to actual conditions. Preferably, there are 2 choke grooves, the groove depth is 55mm and 44mm respectively, the groove width is 5mm, and the groove depth and the groove width data are the optimal sizes for simulation and debugging on the full-band measurement antenna. By adopting the choke coil with the groove width and the groove depth, the multipath suppression in the full-frequency-band range of the GNSS can be realized.

The different groove depths respectively correspond to the high frequency and the low frequency of the GNSS, and according to the test, the multipath inhibition can be realized only by looking at two stepped choke grooves, so that more choke grooves can be used, and the maximum is four.

The thickness of the choke metal has no influence on the performance and is generally 2-3mm.

The utility model discloses a vertical choke combines echelonment choke groove, can make the anti multipath ability of antenna reach the level that surpasss traditional choke antenna even, and its volume is about 1/3 ~ 1/5 of traditional choke antenna.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (5)

1. The utility model provides a be applied to miniaturized choke at antenna back which characterized in that, includes the inner core, be provided with a plurality of circular shape chokes by lower supreme equidistant on the inner core, each choke all is coaxial with the inner core, forms the choke groove between the upper and lower adjacent choke, the echelonment is constituteed to adjacent choke groove.

2. A miniaturized choke applied to a rear surface of an antenna as claimed in claim 1, wherein said core and choke are made of a metal material.

3. The miniaturized choke coil applied to the rear surface of an antenna according to claim 1, wherein the number of the choke grooves is 1 or more and 4 or less.

4. A miniaturized choke applied to the back of an antenna according to claim 1, characterized in that a reflective cavity is provided on top of said core.

5. A miniaturized choke applied to a rear surface of an antenna as claimed in claim 1, wherein the thickness of the choke is the same.

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