The present invention relates to a substrate for supporting an antenna pattern. The substrate includes a porous anodic oxide layer having a plurality of pores formed by anodizing metal. A metallic material is filled in at least a part of the pores.

Method and apparatus for making antennas and antenna components suitable for wideband transmission and reception are disclosed. Material accretion devices or apparatus such as a 3D printer can be used to form the antennas and antenna components. The antenna and antenna components can include folded and/or self-similar features.

Method and apparatus for making antennas and antenna components suitable for wideband transmission and reception are disclosed. Material accretion devices or apparatus such as a 3D printer can be used to form the antennas and antenna components. The antenna and antenna components can include folded and/or self-similar features.

Methods for manufacturing RFID devices are provided with self-limiting heating features. Inducing current flow through the antenna of an RFID device (e.g., by exposing the antenna to a changing magnetic field) will increase heat of the RFID device, thereby curing/sintering elements of the RFID device (which may include curing an adhesive used to couple the antenna to an RFID chip) without applying external heat, which typically heats regions of the RFID device that were not intended to be heated (e.g., the substrate to which the antenna is secured). Inducing current flow through the antenna of an RFID device will reduce the resistance of the antenna, which has a heat-limiting effect that prevents overheating of the RFID device. Inducing current flow may also change the resonant frequency of the antenna, which may provide another heat-limiting effect.

A wireless communication system including an electrically conductive passive medium capable of simultaneously propagating therealong electromagnetic first and second currents at different respective frequencies F1 and F2, the electrically conductive passive medium including an electrically conductive first passive linear medium portion adjacent an electrically conductive first passive nonlinear medium portion, the first passive nonlinear medium portion capable of generating an intermodulation current based on a nonlinear interaction between the first and second currents, the intermodulation current having a frequency Fi equal to nF1+mF2 and propagating along the first passive nonlinear medium portion, m and n being positive or negative integers; and a first magnetic film disposed proximate an electrically conductive external surface of the first linear medium portion, such that when the first and second currents propagate along the first passive linear medium portion toward the first passive nonlinear medium portion, the magnetic film reduces or prevents the generation of the intermodulation current in the first passive nonlinear medium portion by attenuating at least portions of the first and second currents.

A radio frequency device includes antennas, transmitters, power detectors, a memory storing instructions and an antenna gain lookup table, and processors. The processors execute instructions that include instructing the transmitters to send transmission signals through the antennas to form a first beamformed signal having a first beam direction and a first frequency using multiple input powers. The instructions include determining radio frequency integrated circuit (RFIC) gains associated with the transmitters based on the transmission signals using the power detectors. Moreover, the instructions include determining the antenna gains for the antennas based on the first beam direction and the first frequency of the first beamformed signal, and the antenna gain lookup table. The instructions also include determining total gains based on the RFIC gains and the antenna gains, and adjusting the input powers based on the total gains and a back off power signal.

An active antenna may be installed within a ceiling assembly of a building to improve the range of a wireless and/or cellular network. Further, a ground plane may be installed throughout the ceiling to reduce the occurrence of multipath interference of radio frequency (RF) signals. In addition, one or more active and/or passive antennas may also be installed in the ceiling to further extend the range of the wireless and/or cellular network within the building. Each of the antennas may be designed to facilitate (RF) signal gain for a collection or range of frequencies. In some instances, the installation of active and/or passive antennas may increase the range of a communications network, while the installation of a ground plane throughout the ceiling may reduce the occurrence on multipath interference resulting in improved wireless and/or cellular network performance including increased bandwidth and range.

A non-transitory computer-readable storage medium storing an antenna design program that causes a computer to execute a process, the process including acquiring a target characteristic value of a target antenna when a value of a structure parameter is a predetermined value, based on the predetermined value of the structure parameter, the target characteristic value, and a relation, with respect to a reference antenna, between a value of a structure parameter and a characteristic value, estimating the relation with respect to the target antenna, the reference antenna having a same shape feature as the target antenna, an antenna type of the reference antenna being different from the target antenna, determining a value of the structure parameter for the target antenna such that the characteristic value of the target antenna satisfies a demanded specification based on the estimated relation, and outputting the determined value of the structure parameter.

A non-transitory computer-readable storage medium storing an antenna design program that causes a computer to execute a process, the process including acquiring a target characteristic value of a target antenna when a value of a structure parameter is a predetermined value, based on the predetermined value of the structure parameter, the target characteristic value, and a relation, with respect to a reference antenna, between a value of a structure parameter and a characteristic value, estimating the relation with respect to the target antenna, the reference antenna having a same shape feature as the target antenna, an antenna type of the reference antenna being different from the target antenna, determining a value of the structure parameter for the target antenna such that the characteristic value of the target antenna satisfies a demanded specification based on the estimated relation, and outputting the determined value of the structure parameter.

Embodiments relate to an elastically deformable item of sports equipment (100; 200; 250; 300; 500), comprising at least one deformable electromagnetic coil structure (104; 204; 254; 304; 504) arranged around a curved surface (102; 106; 202; 206; 252; 256; 302; 306; 502; 506) within the item of sports equipment, wherein the at least one deformable electromagnetic coil structure has an elongation reserve corresponding to a maximum elastic deformation of the item of sports equipment.