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Broadband Lora communication terminal antenna

A communication terminal and wide-band technology, which is applied in the field of wide-band Lora communication terminal antennas, can solve the problems of narrow effective bandwidth of the antenna, inability to take advantage of the long-distance advantages of Lora technology, and increase of the standing wave ratio of the antenna, so as to achieve the effect of increasing the communication distance

Inactive Publication Date: 2018-12-14
深圳慧联无限科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the effective bandwidth of these antennas is usually narrow, and when applied in a wide frequency band (such as CN470, US915), the standing wave ratio of the antenna increases sharply at the edge frequency, which greatly reduces the communication coverage and cannot give full play to the long-distance advantages of Lora technology.

Method used

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  • Broadband Lora communication terminal antenna
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] In the existing radio frequency link of Lora communication terminal, an antenna matching circuit is added in the receiving and transmitting channels respectively, and the wave standing ratio is monitored.

[0047] The results of Example 1 and Comparative Example 1 are as follows: figure 2 As shown, will figure 2 The three curves in are named the first curve, the second curve, and the third curve from left to right according to the left and right order of their lowest points.

[0048] The second curve is the original state of the antenna in Comparative Example 1, the resonance point is near 490M, and the standing wave ratio (VSWR) at the sideband frequency points of 470M and 510M is very poor;

[0049] The first curve is the state when embodiment 1 switches to receiving, and the resonance point changes to around 480M, ensuring that the entire receiving frequency band of 470-490M has a better standing wave ratio (VSWR);

[0050] The third curve is the state when the f...

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Abstract

The invention discloses a broadband Lora communication terminal antenna, comprising: an MCU microprocessing unit, transmitting transmission information to a Lora transceiver, converting the received transmission information into a modulated radio frequency signal, transmitting the radio frequency signal to a radio frequency switch through a transmission channel, and radiating the radio frequency signal to a space through the antenna; the transmitting channel that comprises a transmitting radio frequency matching circuit and a transmitting antenna matching circuit which are connected in turn; and the radio frequency switch that switches and connects the radio frequency switch circuit to the receiving channel or the transmitting channel. The MCU micro-processing unit communicatively connectswith the radio frequency switch, and controls the radio frequency switch to switch to the transmitting channel, so that the radio frequency switch circuit is connected with the transmitting antenna matching circuit. The invention has the advantages of greatly improving the antenna efficiency in the radio frequency link of the existing Lora communication terminal and improving the communication coverage range, and can be widely applied to the technical field of the antenna of the Lora communication terminal in a wide frequency band.

Description

technical field [0001] The invention relates to the technical field of broadband Lora communication terminal antennas. More specifically, the present invention relates to a broadband Lora communication terminal antenna. Background technique [0002] With the rapid development of the Internet of Things industry, many communication technologies used in the field of Internet of Things have emerged on the market, such as WIFI, Bluetooth, Zigbee, Sigfox, Lora and NB-IOT. Among them, Lora is being chosen by more and more people as the core technology solution for IoT applications due to its low power consumption, long distance, strong anti-interference, low cost, and flexible networking. In the Lora Internet of Things networking (LoraWan) structure, Lora communication terminals have become a very important part of the LoraWan network due to their large number, supported sensor types and numerous application solutions. Lora communication terminals are limited by size, cost, and i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/40
CPCH04B1/40
Inventor 童伟刘裕
Owner 深圳慧联无限科技有限公司
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