Radio frequency energy transmission device, radio frequency energy harvesting device and radio frequency energy transmission method

Abstract

The invention relates to a radio frequency energy transmission device, a radio frequency energy harvesting device and a radio frequency energy transmission method. The radio frequency energy transmission device having polarization tracking is applied to the radio frequency energy harvesting device and comprises a power radar emission module and a radar control module, wherein the power radar emission module is used for receiving a power signal source and emitting an electromagnetic wave source by a polarization antenna (or an antenna array), the radar control module is electrically connected to the power radar emission module and is used for receiving a reflection wave source, the frequency of the reflection wave source is different from the frequency of the electromagnetic wave source, the reflection wave source is secondary harmonic of the electromagnetic wave source, the reflection wave source is generated and emitted after the electromagnetic wave source is received by the radio frequency energy harvesting device, a polarization angle of the reflection wave source of the radio frequency energy harvesting device is judged after the reflection wave source is received by the radarcontrol module, an polarization angle of an antenna in the power radar emission module and the polarization angle of the reflection wave source of the radio frequency energy harvesting device are adjusted to conform to a predetermined angle so as to achieve excellent energy receiving size.

Description

technical field [0001] The present disclosure relates to a radio frequency energy transmission device with polarization tracking, a radio frequency energy hunting device and a radio frequency energy transmission method thereof, in particular to a radio frequency energy transmission device applying tracking second harmonic reflection, a radio frequency energy hunting device and its Radio frequency energy transfer method. Background technique [0002] As the topic of the Internet of Things (IOT) is getting more and more attention, the related issue of sensor charging is also becoming more and more important. Relatively speaking, the number of sensors required is a multiple of the core circuit (data processing center) of the main body of the Internet of Things, so there are great business opportunities. The function of some sensors in the circuit is simple and simple (for example: only responsible for sending a single special message of the surrounding environment - such as te...

AI Technical Summary

Problems solved by technology

However, between the energy transducer and the energy hunting device, the polarization of the two antennas is a challenge

Based on application requirements, the type and quantity of antennas used by most sensors are often limited in order to pay attention to thinness and shortness

For example, energy hunting devices at the energy receiving end often use planar antennas fabricated on printed circuit boards (PCBs). Antenna Design Options

In addition, as far as the wireless energy transmission system with energy transducers and energy hunting devices is concerned, the orientation of the energy transducers is often fixed; but as far as the energy hunting device itself is concerned, whether it is fixed or mobile , relative to the energy transducer, the angle of placement may make the antenna polarization direction of the energy hunting device not exactly the same as the antenna polarization direction of the transducer, so that the energy receiving performance of the energy hunting device is compromised

Although using a circularly polarized antenna or multiple antennas with different directions on the energy hunting device can improve the receiving efficiency, such a solution requires a large antenna footprint

On the other hand, if a circularly polarized antenna is used at the energy transducer end and the receiving end does not use a circularly polarized antenna, often the energy hunting device can only receive large and small wireless energy transmission energy.

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