Abstract: A waveguide structure includes a dielectric layer, a plurality of circuit layers, a plurality of insulation layers, and a conductor connection layer. The dielectric layer has an opening. The circuit layers are disposed on the dielectric layer. The insulation layers and the circuit layers are alternately stacked. The conductor connection layer covers an outer wall of the opening in a direction perpendicular to the circuit layers and connects at least two circuit layers on two opposite sides of the opening. At least the conductor connection layer and a part of the circuit layers define an air cavity for transmitting signals at a position corresponding to the opening.

Abstract: A waveguide structure includes a dielectric layer, a plurality of circuit layers, a plurality of insulation layers, and a conductor connection layer. The dielectric layer has an opening. The circuit layers are disposed on the dielectric layer. The insulation layers and the circuit layers are alternately stacked. The conductor connection layer covers an outer wall of the opening in a direction perpendicular to the circuit layers and connects at least two circuit layers on two opposite sides of the opening. At least the conductor connection layer and a part of the circuit layers define an air cavity for transmitting signals at a position corresponding to the opening.

Abstract: A dual-polarized patch antenna includes a first insulating substrate; conductive connections, each of which passes through the first insulating substrate, and which are arranged to form a resonant cavity and two feeding ports; first and second metal layers respectively disposed on two opposite surfaces of the first insulating substrate, the second metal layer being formed with a cross-shaped slot that corresponds in position to the resonant cavity; a second insulating substrate disposed on the second metal layer; and four radiation patch units disposed on the second insulating substrate, and corresponding in position to four regions that are on the second metal layer and that are spaced apart by the cross-shaped slot.

Abstract: A pattern reconfigurable antenna includes a radiator, a first parasitic element, a second parasitic element, a ground plane, a first switch and a second switch. The radiator includes a feed portion and a radiating portion that are interconnected. The first and second parasitic elements are symmetrically located at two opposite sides of the radiating portion, and are closely adjacent to and spaced apart from the radiating portion. The ground plane is located at another side of the radiating portion, and is spaced apart from the first and second parasitic elements. Each of the first and second switches is connected between the ground plane and a respective one of the first and second parasitic elements, and is operable to establish connection between the same.

Abstract: A pattern reconfigurable antenna includes a radiator, a first parasitic element, a second parasitic element, a ground plane, a first switch and a second switch. The radiator includes a feed portion and a radiating portion that are interconnected. The first and second parasitic elements are symmetrically located at two opposite sides of the radiating portion, and are closely adjacent to and spaced apart from the radiating portion. The ground plane is located at another side of the radiating portion, and is spaced apart from the first and second parasitic elements. Each of the first and second switches is connected between the ground plane and a respective one of the first and second parasitic elements, and is operable to establish connection between the same.

Abstract: A signal line conversion structure of the antenna array is disposed between the antenna array and the circuit substrate, which includes a first dielectric substrate is disposed on the circuit substrate, a second dielectric substrate is vertically disposed on the first dielectric substrate and divided into a first region and a second region, and the second dielectric substrate is provided with the antenna array. At least one signal line is disposed on the first region and extends to the second dielectric substrate for connecting the circuit substrate and the antenna array. A metal connecting plate has at least three metal through holes pierced in the first dielectric substrate and connected to the second ground layer. The metal connecting plate is connected to the first ground layer of the first dielectric substrate and the second ground layer of the second dielectric substrate through the metal through holes.

Abstract: A signal line conversion structure of the antenna array is disposed between the antenna array and the circuit substrate, which includes a first dielectric substrate is disposed on the circuit substrate, a second dielectric substrate is vertically disposed on the first dielectric substrate and divided into a first region and a second region, and the second dielectric substrate is provided with the antenna array. At least one signal line is disposed on the first region and extends to the second dielectric substrate for connecting the circuit substrate and the antenna array. A metal connecting plate has at least three metal through holes pierced in the first dielectric substrate and connected to the second ground layer. The metal connecting plate is connected to the first ground layer of the first dielectric substrate and the second ground layer of the second dielectric substrate through the metal through holes.

Abstract: The present disclosure relates to a radio frequency identification (RFID) tag antenna. The RFID tag antenna includes: a substrate having a first surface and a second surface, a feeding structure mounting on the first surface and a rotation structure mounting on the second surface. Specifically, the feeding structure corresponds to the rotation structure for forming a resonant circuit.

Abstract: An antenna structure comprises a substrate, a first antenna unit and a second antenna unit. The substrate comprises a first surface and a second surface opposing the first surface. The first antenna unit is disposed on the first surface, and comprises at least a first slot with a wider inside and narrower outside at the edge of the first antenna unit. The second antenna unit is disposed on the second surface, and is connected to the first antenna unit through a hole in the substrate. The radius of the at least one first slot is one-fourth the wavelength of the central frequency of the antenna structure.

Abstract: A zero bias power detector comprising a zero bias diode and an output boost circuit is provided. The output boost circuit comprises a zero bias transistor. The zero bias diode is not biased but outputs a rectifying signal according to a wireless signal. The zero bias transistor, not biased but coupled to the zero bias diode, is used for enhancing the rectifying signal.

Abstract: The present disclosure relates to a radio frequency identification (RFID) tag antenna. The RFID tag antenna includes: a substrate having a first surface and a second surface, a feeding structure mounting on the first surface and a rotation structure mounting on the second surface. Specifically, the feeding structure corresponds to the rotation structure for forming a resonant circuit.

Abstract: An antenna structure comprises a substrate, a first antenna unit and a second antenna unit. The substrate comprises a first surface and a second surface opposing the first surface. The first antenna unit is disposed on the first surface, and comprises at least a first slot with a wider inside and narrower outside at the edge of the first antenna unit. The second antenna unit is disposed on the second surface, and is connected to the first antenna unit through a hole in the substrate. The radius of the at least one first slot is one-fourth the wavelength of the central frequency of the antenna structure.

Abstract: A holographic data storing method includes the steps of: encoding original data to generate holographic data according to a codeword to symbol relation; and recording a hologram corresponding to the holographic data onto a holographic storage medium. In the codeword to symbol relation, a plurality of sample symbols corresponds to a plurality of codewords. Each of the sample symbols corresponds to a pattern having N*N pixels. There are M bright pixels in the N*N pixels, wherein N and M are positive integers and M is smaller than N*N. A hamming distance of the sample symbols is greater than or equal to 4, and a two-dimensional run-length of the sample symbols is greater than or equal to 2.

Abstract: A zero bias power detector comprising a zero bias diode and an output boost circuit is provided. The output boost circuit comprises a zero bias transistor. The zero bias diode is not biased but outputs a rectifying signal according to a wireless signal. The zero bias transistor, not biased but coupled to the zero bias diode, is used for enhancing the rectifying signal.

Abstract: An exemplary example of the present disclosure proposes an electromagnetic conductor reflecting plate including a perfect electronic conductor and at least two artificial magnetic conductors, wherein the each of the artificial magnetic conductor is disposed on arbitrary one side of the perfect electronic conductor, and a boundary between the perfect electronic conductor and each of the artificial magnetic conductor forms a virtual radiation unit. In addition, an exemplary example of the present disclosure further proposes an antenna array including an antenna and the electromagnetic conductor reflecting plate, wherein the antenna is disposed on the electromagnetic conductor reflecting plate.

Abstract: A hologram media reading apparatus including a reference light source, a stop with gray level aperture, and an optical sensor is provided. The reference light source is disposed on one side of a hologram medium, and capable of emitting a reference light beam. The reference light beam is transmitted to the hologram medium. The stop with gray level aperture and the reference light source are disposed on the same side or opposite sides of the hologram medium. The stop with gray level aperture has a light transmissive region, an opaque region, and a transmittance gradually varying region. The opaque region surrounds the light transmissive region. The transmittance gradually varying region surrounds the light transmissive region. A part of the reference beam from the hologram medium passes through the stop with gray level aperture and is transmitted to the optical sensor.

Abstract: An exemplary example of the present disclosure proposes an electromagnetic conductor reflecting plate including a perfect electronic conductor and at least two artificial magnetic conductors, wherein the each of the artificial magnetic conductor is disposed on arbitrary one side of the perfect electronic conductor, and a boundary between the perfect electronic conductor and each of the artificial magnetic conductor forms a virtual radiation unit. In addition, an exemplary example of the present disclosure further proposes an antenna array including an antenna and the electromagnetic conductor reflecting plate, wherein the antenna is disposed on the electromagnetic conductor reflecting plate.

Abstract: A holographic data storing method includes the steps of: encoding original data to generate holographic data according to a codeword to symbol relation; and recording a hologram corresponding to the holographic data onto a holographic storage medium. In the codeword to symbol relation, a plurality of sample symbols corresponds to a plurality of codewords. Each of the sample symbols corresponds to a pattern having N*N pixels. There are M bright pixels in the N*N pixels, wherein N and M are positive integers and M is smaller than N*N. A hamming distance of the sample symbols is greater than or equal to 4, and a two-dimensional run-length of the sample symbols is greater than or equal to 2.

Abstract: A video surveillance system gets a first image from at least a video source, and extracts its image features. It embeds annotation information with at least the image features into the first image, and converts the embedded image into a second image without changing the image format. After having compressed and decompressed the second image, the system extracts the embedded information from the decompressed embedded stream to separate the image and the annotation information, thereby obtaining completely recovered annotation information after a recovery process and an image processing. Because the image format is not changed, the operations on the second image at the rear end of the system, such as compression and decompression, are not affected.

Abstract: A hologram media reading apparatus including a reference light source, a stop with gray level aperture, and an optical sensor is provided. The reference light source is disposed on one side of a hologram medium, and capable of emitting a reference light beam. The reference light beam is transmitted to the hologram medium. The stop with gray level aperture and the reference light source are disposed on the same side or opposite sides of the hologram medium. The stop with gray level aperture has a light transmissive region, an opaque region, and a transmittance gradually varying region. The opaque region surrounds the light transmissive region. The transmittance gradually varying region surrounds the light transmissive region. A part of the reference beam from the hologram medium passes through the stop with gray level aperture and is transmitted to the optical sensor.