Abstract: An embodiment of the invention provides a radio frequency (RF) device calibration method. The method includes: obtaining a measurement result of a channel of a first-stage device under a control condition; obtaining a reference measurement result of a reference channel of a second-stage device, wherein the channel corresponds to the reference channel, and the measurement result and the reference measurement result are measured before the first-stage device and the second-stage device are assembled into an RF device; determining an estimated measurement result corresponding to the channel based on the measurement result and the reference measurement result; obtaining a post-assembly measurement result of the channel of the RF device under the control condition after the first-stage device and the second-stage device are assembled into the RF device; and performing a calibration operation corresponding to the channel based on the estimated measurement result and the post-assembly measurement result.

Abstract: An emulator system and an emulating method for satellite communication are provided. The emulating method includes: providing a first antenna array, wherein the first antenna array includes a plurality of antenna units arranged along a first direction; mounting the device under test on a virtual plane by a jig; enabling a first beam by the first antenna array; steering the first beam to the device under test by a default angle of incidence; transmitting a first signal to the device under test via the first beam, and receiving a second signal corresponding to the first signal from the device under test; calculating a value of phase difference according to the second signal; determining whether the device under test passes a test according to the value of phase difference and a threshold to generate a testing result; and outputting the testing result.

Abstract: A configuration method of reflectarray and an electronic device are provided, wherein the reflectarray includes a plurality of reflective units. The configuration method includes: obtaining a first incidence signal characteristic of a target incidence signal and a first reflected signal characteristic of a target reflected signal; determining a geometric shape type of a virtual reflective surface according to the first incidence signal characteristic and the first reflected signal characteristic; configuring the virtual reflective surface according to the first incidence signal characteristic and the first reflected signal characteristic, wherein the virtual reflective surface intersects a first reflective unit of the reflective units; and determining delay compensation of at least a part of the reflective units according to the first incidence signal characteristic, the first reflected signal characteristic, and the geometric shape type to configure the reflective units.

Abstract: Provided is an integrated antenna device, which includes a substrate, at least one antenna, a radio-frequency integrated circuit (RFIC), multiple metal pillars, an encapsulation and a heat conducting structure. The antenna and the RFIC are respectively disposed on a first surface and a second surface of the substrate. A third surface of the RFIC is facing the second surface. Multiple first ends of the metal pillars that surround the RFIC are disposed on the second surface. The encapsulation is disposed on the second surface and encapsulates at least one portion of the RFIC and at least one portion of each of the metal pillars. The heat conducting structure is disposed above a fourth surface of the RFIC.

Abstract: An integrated antenna device and a phase calibration method thereof are provided. The integrated antenna device includes an antenna array formed by patch antenna units and a beamforming integrated circuit. The antenna array is disposed on a first surface of a substrate. The patch antenna units are symmetrically arranged around an array center of the antenna array, and each of the patch antenna units includes a first feed point and a second feed point. The BFIC is disposed on a second surface of the substrate and connected to the first feed point and the second feed point of each patch antenna unit. The first feed point and the second feed point of each patch antenna unit are disposed outside each patch antenna unit relative to the array center of the antenna array. The BFIC overlaps a central area of the antenna array.

Abstract: The disclosure provided a rat-race coupler, including an annular-shaped conductor and a first bandwidth adjustment part. The annular-shaped conductor includes a first strip-shaped conductor, a second strip-shaped conductor, a third strip-shaped conductor, and a fourth strip-shaped conductor. The first strip-shaped conductor has a first terminal and a second terminal. The second strip-shaped conductor has a third terminal and a fourth terminal. The first terminal is connected to the third terminal through the third strip-shaped conductor, the second terminal is connected to the fourth terminal through the fourth strip-shaped conductor. The first bandwidth adjustment part includes a fifth strip-shaped conductor, a sixth strip-shaped conductor, and a seventh strip-shaped conductor. The seventh strip-shaped conductor has a fifth terminal and a sixth terminal.

Abstract: The disclosure provides a coplanar inductor, which includes a first spiral arm, a second spiral arm and a conductive patch. The first spiral arm has a first end and a second end, wherein the first spiral arm spirally extends from the first end of the first spiral arm toward the second end of the first spiral arm from inside to outside. The second spiral arm has a first end and a second end. The second spiral arm extends spirally from the first end of the second spiral arm toward the second end of the second spiral arm from inside to outside. The first end of the second spiral arm is coupled to the first end of the first spiral arm through the conductive patch, and the first spiral arm and the second spiral arm are coplanar.

Abstract: An antenna unit includes a first substrate, a second substrate, a plurality of sidewalls, a liquid crystal layer, a first electrode, a second electrode, and a plurality of sidewall electrodes. The second substrate is opposite to the first substrate. The plurality of sidewalls are supported between the first substrate and the second substrate. The liquid crystal layer is located between the first substrate, the second substrate, and the plurality of sidewalls. The first electrode is disposed on the first substrate. The second electrode is disposed on the second substrate and electrically insulated from the first electrode. The plurality of sidewall electrodes are electrically insulated from each other and are respectively disposed on the plurality of sidewalls. The plurality of sidewall electrodes are electrically insulated from the first electrode and the second electrode. An antenna array and an operating method thereof are also provided.

Abstract: The disclosure is directed to a method for measuring an angle of arrival (AoA), with a steerable phased array. The method would include but not limited to: receiving a signal by the steerable phased array with a first steering angle and with a second steering angle; obtaining a first power-related information (PRI1) of the signal corresponding to the first steering angle; obtaining a second power-related information (PRI2) of the signal corresponding to the second steering angle; and calculating an AoA of the signal based on the first power-related information and the second power-related information, wherein the first steering angle is different from the second steering angle, and an absolute difference between the first steering angle and the second steering angle is less than FNBW/2.

Abstract: An electrical switch, including an insulation base, an insulative-and-movable component, at least two output ports, and at least two transmission ports, is provided. The insulative-and-movable component is disposed on the insulation base and is adapted to operate between at least two switch positions relative to the insulation base. The two output ports are disposed on the insulation base. The two transmission ports are disposed on the insulative-and-movable component. When the insulative-and-movable component is located at one of the two switch positions, one of the two output ports is aligned with one of the two transmission ports and other one of the two output ports is misaligned with other one of the two transmission ports.

Abstract: An antenna unit includes a first substrate, a second substrate, a plurality of sidewalls, a liquid crystal layer, a first electrode, a second electrode, and a plurality of sidewall electrodes. The second substrate is opposite to the first substrate. The plurality of sidewalls are supported between the first substrate and the second substrate. The liquid crystal layer is located between the first substrate, the second substrate, and the plurality of sidewalls. The first electrode is disposed on the first substrate. The second electrode is disposed on the second substrate and electrically insulated from the first electrode. The plurality of sidewall electrodes are electrically insulated from each other and are respectively disposed on the plurality of sidewalls. The plurality of sidewall electrodes are electrically insulated from the first electrode and the second electrode. An antenna array and an operating method thereof are also provided.

Abstract: A detection system and a detection method of vital sign are provided. The method includes: transmitting a first radio frequency (RF) signal and receiving a first radar signal corresponding to the first RF signal by a first radar; performing IQ-demodulation on the first radar signal to obtain a first receiving in-phase component and a first receiving quadrature component; performing a first convolution operation to the first receiving in-phase component and a first symbol and performing a multiply accumulate (MAC) operation to a first result of the first convolution operation to obtain a first accumulated value; performing a second convolution operation to the first receiving quadrature component and the first symbol and performing a MAC operation to a second result of the second convolution operation to obtain a second accumulated value; and generating a vital sign according to the first and the second accumulated value.

Abstract: An antenna device includes a differential antenna and a first balun. The differential antenna includes a first radiator, a first antenna port and a second antenna port connected to a first surface of the first radiator. Orthographic projections of the first antenna port and the second antenna port projected to the first radiator are symmetrical to a midpoint of the first radiator. The first balun is located on one side of the first surface of the first radiator, and its orthographic projection on the first plane where the first surface is located overlaps the first surface. The first balun includes a first port, a first wiring, a first coupling structure electrically connected to the first antenna port, and a second coupling structure electrically connected to the second antenna port. Neither the first coupling structure nor the second coupling structure directly contacts the first wiring.

Abstract: A testing base includes a housing, a carrier, a wave absorber, and a filler. The housing has an inner surface. The carrier is disposed on the housing. The carrier includes an upper surface, a lower surface, and a groove recessed in the upper surface. The groove is adapted for accommodating a component to be tested. The lower surface and the inner surface of the housing define a cavity body together. The wave absorber is disposed on the inner surface of the housing. The filler is filled in the cavity body and contacts the wave absorber and the carrier. A relative permittivity of the filler is less than or equal to 2.

Abstract: Provided is an electromagnetic wave reflectarray, including a first substrate, a second substrate, first wires and second wires respectively arranged on the first substrate and the second substrate along a first direction and a second direction, antenna electrodes and tuning electrodes respectively arranged into first electrode strings and second electrode strings electrically connected to the first wires and the second wires on the first substrate and the second substrate along the first direction, and a liquid crystal layer disposed between the first substrate and the second substrate. The tuning electrodes completely cover the orthographic projections of the antenna electrodes on the second substrate.