National Chung Cheng University

Sheng-Fuh Chang

Chia-Chan Chang

Yuan-Chun Lin

Shih-Cheng Lin

Shih-cheng Lin

Yi-Ming Chen

Sheng-Chi Hsieh

Yu-Cheng Lin

Chun-Chi Lin

Po-Yu Tsai

Cheng-Yu Chou

Wei-Yang Chen

Wei-Lun Hsu

Ting-Hao Shin

A Reconfigurable ReflectArray (RRA) structure includes a P-Intrinsic-N (P-I-N) diode and a metal circuit. The metal circuit includes a first metal member and a second metal member. The first metal member is coupled to one end of the P-I-N diode. The second metal member is coupled to another end of the P-I-N diode. One of the first metal member and the second metal member includes a first radiating portion and a second radiating portion. The first radiating portion is located between the P-I-N diode and the second radiating portion. The first radiating portion has a first length. The second radiating portion has a second length. The first length is different from the second length.

Reconfigurable reflectarray structure and control circuit having reconfigurable reflectarray structure

A reconfigurable intelligent surface includes a radiant layer, a sensing feeding circuit layer, a processing layer and a controlling circuit layer. The radiant layer includes at least two antennas and a plurality of reflecting units. Each of the at least two antennas is configured for sensing a polarization, a frequency or a direction angle of an incident electromagnetic wave. The reflecting units are arranged to form a reflecting surface. The sensing feeding circuit layer is signally connected to the antennas. The processing layer is signally connected to the sensing feeding circuit layer, and the processing layer is configured to produce a controlling signal corresponding thereto. The controlling circuit layer is signally connected to the radiant layer and the processing layer, wherein the controlling circuit layer receives the controlling signal and controls the reflecting units according to the controlling signal to adjust and form a reflecting electromagnetic wave.

Reconfigurable intelligent surface and electromagnetic sensing system based on reconfigurable intelligent surface

A system for diffraction of an electromagnetic wave includes a substrate, a transmission unit, and a plurality of antennas. The substrate is made of a second medium. The transmission unit is disposed on the substrate. The transmission unit has a plurality of transmission lines. Each of the transmission lines has a transmission line length that is associated with a first medium operation wavelength that is associated with an operation frequency. The transmission lines are connected successively. The antennas are disposed on the substrate, respectively.

System and method for diffraction of electromagnetic wave

A method of manufacturing an electromagnetic wave reflecting structure includes the steps of presetting an operating frequency, a reflected wave pointing angle, an incident wave pointing angle, and an incident distance of an electromagnetic wave; obtaining an electromagnetic wave reflecting structure phase distribution of an electromagnetic wave reflecting structure according to the operating frequency, the reflected wave pointing angle, the incident wave pointing angle, and the incident distance; and arranging a plurality of reflecting elements on a substrate according to the electromagnetic wave reflecting structure phase distribution and a reflecting element phase curve of any one of the reflecting elements at the operating frequency.

Electromagnetic wave reflecting structure and manufacturing method thereof

An electromagnetic wave transmission structure adapted to cause convergence of an electromagnetic wave includes a substrate and a transmission unit provided on the substrate and including an annular metal plate. The annular metal plate has a weighted average inner radius and a weighted average outer radius each related to the wavelength of the electromagnetic wave, the distance between the electromagnetic wave transmission structure and a focal point defined as the point of convergence of the electromagnetic wave, and the distance between the source of the electromagnetic wave and the focal point. The plural inner and outer radii of the annular metal plate have the same trend of variation. Each inner or outer radius corresponds to a weight related to the reference included angle formed between the inner or outer radius and a reference axis.

Electromagnetic wave transmission structure, electromagnetic wave transmission structure array, and electromagnetic wave transmission and shifting method

A method for deploying an electromagnetic wave guiding structure includes a communication dead zone analysis step and an improvement measure determination step. In the former step, a frequency band in use and an electromagnetic wave signal strength threshold value are preset, and a processing module creates an electromagnetic map for the electromagnetic wave intensity over an area in the frequency band in use based on an electronic map of the area, wherein the electromagnetic map shows a communication dead zone. In the latter step, the processing module obtains an existing electromagnetic wave path according to the electromagnetic map and infers from the existing electromagnetic wave path the installation position and type of at least one electromagnetic wave guiding structure assembly suitable for use to guide the electromagnetic wave to the communication dead zone and ensure that the coverage ratio of the electromagnetic wave in the area reaches a threshold value.

Method for deploying electromagnetic wave guiding structure

A high-frequency chip antenna measurement system includes a platform; two piers; an arching; a stepper motor; an indication and fastening assembly having a source antenna holder and an illuminant indicator; a carrier stage; a chip antenna carrier having a support member and two sloping posts extending upward and outward from a top end of the support member, two chip antenna carrier benches being mounted to top ends of the two sloping posts respectively; a probe carrier having a support plate directionally variably fixed to the carrier substrate, two props fixed to the support member and parallel to each other and extending outward and upward slantingways, and a probe carrier bench mounted to top ends of the two props for bearing a probe; and a bridging member having two ends mounted to the chip antenna carrier benches.

High-frequency chip antenna measurement system

A battery-free electromagnetic leakage detector includes a substrate, an antenna, a filter circuit electrically connected with the antenna, a clamp circuit electrically connected with the filter circuit, and an indicating member electrically connected with the clamp circuit. Accordingly, the battery-free electromagnetic leakage detector is structurally simple and compact and can detect electromagnetic waves and display the detection without connection with any external power source.

Battery-free electromagnetic leakage detector

The present invention discloses a switchable frequency response microwave filter, which uses voltage-controlled varactors to attain the separation or combination of the odd mode and even mode of signals in a dual-mode ring resonator to realize a bandpass or bandstop function and then controls the frequency response of the output filtered signals. Further, the present invention integrates different circuit architectures having bandpass and bandstop functions into a single circuit to reduce the complexity of the circuit.

Growing community of inventors

Chiayi County, Taiwan

Sheng-Fuh Chang