CN210838071U - Implanted antenna - Google Patents

Abstract

An embedded antenna relates to the technical field of antennas and solves the technical problem of miniaturization of antennas. The antenna comprises a dielectric substrate and a main radiating body fixed on the dielectric substrate, wherein the main radiating body is in a spiral shape, a plurality of short-circuit terminals are fixed on the main radiating body, and the short-circuit terminals are distributed at intervals; and a feed terminal and an antenna ground terminal are fixed on the dielectric substrate, the feed terminal and the antenna ground terminal are arranged below the main radiator, the feed terminal is connected with the inner end of the spiral of the main radiator through a conductor, and each short-circuit terminal on the main radiator is respectively connected to the antenna ground terminal through a conductor. The utility model provides an antenna is applicable to implanted equipment such as implanted cardiac pacemaker, implanted neurostimulator.

Description

Implanted antenna

Technical Field

The utility model relates to an antenna technology especially relates to a technique of implanted antenna.

Background

Implantable devices (e.g., implantable cardiac pacemakers, implantable neurostimulators, etc.) may operate in the body for extended periods of time, enabling data communication with the extracorporeal device when desired.

After the implanted device is implanted into a target body, the implanted device needs to communicate with external equipment in a wireless communication mode, the wireless communication needs to use an antenna to transmit and receive electromagnetic waves, the volume of the implanted device is limited, how to realize a high-performance antenna in a small space is a key technology and a difficulty for the communication between the implanted device and the external equipment, the existing implanted antennas are planar antennas, the existing implanted antennas occupy large areas, the miniaturization of the implanted device is difficult, and the existing implanted antennas can only excite one resonant frequency point at the same time.

SUMMERY OF THE UTILITY MODEL

To the defect that exists among the above-mentioned prior art, the utility model aims to solve the technical problem that an area occupied is little to can excite the implanted antenna of a plurality of resonant frequency points simultaneously.

In order to solve the technical problem, the utility model provides an implanted antenna, including the medium substrate, and fix the main radiator on the medium substrate, its characterized in that:

the main radiating body is in a spiral shape, a plurality of short-circuit terminals are fixed on the main radiating body, and the short-circuit terminals are distributed at intervals;

and a feed terminal and an antenna ground terminal are fixed on the dielectric substrate, the feed terminal and the antenna ground terminal are arranged below the main radiator, the feed terminal is connected with the inner end of the spiral of the main radiator through a conductor, and each short-circuit terminal on the main radiator is respectively connected to the antenna ground terminal through a conductor.

Furthermore, at least one parasitic radiator separated from the main radiator is fixed on the dielectric substrate.

The utility model provides an implanted antenna adopts the structure of laying the vertical stromatolite of main radiator, feed terminal, antenna ground terminal, has reduced area occupied to each short-circuit terminal through on the main radiator falls into a plurality of subsections with the main radiator, makes the antenna possess a plurality of resonant mode, can stimulate a plurality of resonant frequency points simultaneously.

Drawings

Fig. 1 is a top view of an implantable antenna according to an embodiment of the present invention;

fig. 2 is a front view of an implantable antenna according to an embodiment of the present invention.

Detailed Description

The following description will be made in detail with reference to the accompanying drawings, but the present embodiment is not intended to limit the present invention, and all similar structures and similar variations thereof adopted by the present invention should be included in the protection scope of the present invention, and the relations between the numbers of the components in the present invention are shown.

As shown in fig. 1-2, an implantable antenna according to an embodiment of the present invention includes a dielectric substrate 6, and a main radiator 1 fixed on the dielectric substrate 6, and is characterized in that:

the main radiator 1 is in a spiral shape, a plurality of short circuit terminals 3 are fixed on the main radiator 1, and the short circuit terminals 3 are distributed at intervals;

the feed terminal 2 and the antenna ground terminal 5 are fixed on the dielectric substrate 6, the feed terminal 2 and the antenna ground terminal 5 are both arranged below the main radiator 1, the feed terminal 2 is connected with the spiral inner end of the main radiator 1 through a conductor, and each short-circuit terminal 3 on the main radiator 1 is connected with the antenna ground terminal 5 through a conductor.

The embodiment of the utility model provides an in, each short-circuit terminal 3 on the main radiator 1 can divide into length, the different a plurality of segmentations of shape with the main radiator for the antenna possesses a plurality of resonant mode, can encourage a plurality of different radiation frequency points like this, through adjusting these short-circuit terminal figure and position, can adjust the work matching resonant frequency point and the number of antenna, when arousing two close frequency points, can also increase the radiation bandwidth.

The embodiment of the utility model provides an in, be fixed with at least one parasitic radiator 4 that cuts off each other with main radiator 1 on the medium substrate 6, parasitic radiator parasitic unit not direct feed, but participate in the radiation of antenna jointly with main radiator, and parasitic radiator can play and adjust antenna impedance, improves the matching nature, increases the antenna bandwidth, adjusts the effect of resonance point and adjustment antenna pattern.

The embodiment of the utility model provides an in, main irradiator, short-circuit terminal, feed terminal, antenna ground terminal, parasitic irradiator all can adopt conducting material preparation such as copper, silver, gold, alloy, and the higher material preparation of relative dielectric constant is preferred to the medium substrate to provide the miniaturization that less medium wavelength realized the antenna.

The embodiment of the utility model provides an in, the shape of main radiator 1 can be the spiral line of the regular shape such as archimedes spiral, equiangular spiral, also can be irregular spiral line shape, and the number of turns, line width and the line length of spiral can be adjusted as required.

Claims (2)

1. An embedded antenna, includes the medium substrate, and fixes the main radiator on the medium substrate, characterized by that:

the main radiating body is in a spiral shape, a plurality of short-circuit terminals are fixed on the main radiating body, and the short-circuit terminals are distributed at intervals;

and a feed terminal and an antenna ground terminal are fixed on the dielectric substrate, the feed terminal and the antenna ground terminal are arranged below the main radiator, the feed terminal is connected with the inner end of the spiral of the main radiator through a conductor, and each short-circuit terminal on the main radiator is respectively connected to the antenna ground terminal through a conductor.

2. The implantable antenna of claim 1, wherein: at least one parasitic radiator which is mutually separated from the main radiator is fixed on the dielectric substrate.

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