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Near-field radiator

A radiator, close-range technology, applied in the field of radiators, can solve problems such as incompatibility, and achieve the effect of simple structure and small volume

Pending Publication Date: 2018-03-20
CHENGDU SIWUGE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the field where the operating distance needs to reach 1 meter, the volume requirement is relatively small at 1-2cm, and there are radiation components in different frequency bands in a radiator, such as the radiator in the field of motion extraction. The above technologies and devices are not suitable

Method used

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  • Near-field radiator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Such as figure 1 The short-distance radiator shown includes an access port 1, a capacitor C, a coil L, and a vibrator 2. The access port 1 is connected to a cable to access signals; the capacitor C is connected between the access port 1 and the ground The coil L is connected in parallel to the capacitor, and after the signal is connected through the cable, the relatively low-frequency signal in the electromagnetic wave radiates from the coil to form a short-distance field distribution; the vibrator 2 is connected to the access port 1, and after the signal is connected through the cable, the electromagnetic wave The relatively high-frequency signals radiate from the oscillator to form a close-range field distribution. Another port can also be provided to realize the connection between the above-mentioned capacitor and the ground, and its ground can be realized by connecting the ground shell.

Embodiment 2

[0027] Based on the principle of the above-mentioned embodiment, this embodiment optimizes the above-mentioned embodiment, that is, a resistor R is connected between the access port 1 and the vibrator 2, the resistor is an adjustable resistor, and the signal strength is adjusted through the adjustable resistor.

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PUM

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Abstract

The invention discloses a near-field radiator. The near-field radiator comprises an access port used for signal access, a capacitor connected between the access port and the ground, a coil connected with the capacitor in parallel, and a vibrator connected with the access port. A cable signal passes through the vibrator and the coil of the radiator to realize near field distribution, so that radiation of frequency bands with quite high frequency intervals can be realized; and in addition, the radiator is simple in structure and small in size, can realize the radiation distance of one meter, andcan satisfy the experiment requirements in the fields of action extraction and the like.

Description

technical field [0001] The invention relates to the field of radiators, in particular to a near-distance radiator. Background technique [0002] The problem of short-range electromagnetic field radiation is different from that of antennas in the traditional sense. The energy of the electromagnetic field is concentrated in the Ferriel zone, and not most of it radiates to the far field to form a pattern. The applications of short-range electromagnetic fields are mostly concentrated in the fields of wireless charging and near-field communication NFC, both of which have a working distance of less than 10CM. The number of coil turns of the radiator for wireless charging is very dense, the power capacity is large, and the volume is also large, with an area of ​​about 10 cm. Due to the need for high-quality brass materials, the cost is also high; the near-field communication radiator is small, and the operating distance Also small, good only for work in snug situations. [0003] ...

Claims

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Application Information

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IPC IPC(8): H01Q23/00H04B5/00
CPCH01Q23/00H04B5/70
Inventor 周密吴斌
Owner CHENGDU SIWUGE TECH CO LTD