An RFID tag includes an IC chip on which identification information is recorded, a loop-like conductor that is connected to the IC chip, and an antenna unit that includes two lattice-shaped antenna patterns connected to the loop-like conductor and extending away from each other from the loop-like conductor.

An RFID module includes a laminated body including thermoplastic resin layers, a passive element defined by a conductor pattern on the thermoplastic resin layers, and an RFID IC chip embedded in the laminated body. The RFID IC chip and the conductor pattern are connected to each other by joining an input and output terminal of the RFID IC chip and a pad electrode, and an insulator pattern overlapping the pad electrode is provided around the RFID IC chip in the laminated body in planar view.

A hearing assistance device includes a housing component (12) hosting a transceiver (68) and processing circuitry arranged in a compact block structure (50). A small feed loop (40) is mounted on the compact block structure (50), and is electrically connected to the transceiver (68). The compact block structure (50) is adapted for carrying the small feed loop (40), and the housing component (12) includes an integrated antenna element (30, 80). The housing component (12) and the compact block structure (50) are provided with a set of cooperating mechanical guiding components for maintaining the small feed loop (40) and the antenna element (30, 80) in a well-defined mechanical connection.

Implementations of antennas may include a meandering T-matching structure, a first meandering feed line coupled to the meandering T-matching structure, and a first radiating part coupled to the first meandering feed line. Implementations may include a second meandering feed line coupled to the meandering T-matching structure, and a second radiating part coupled to the meandering feed line. A gap may physically separate the first meandering feed line and the second meandering feed line.

Implementations of antennas may include a meandering T-matching structure, a first meandering feed line coupled to the meandering T-matching structure, and a first radiating part coupled to the first meandering feed line. Implementations may include a second meandering feed line coupled to the meandering T-matching structure, and a second radiating part coupled to the meandering feed line. A gap may physically separate the first meandering feed line and the second meandering feed line.

An antenna apparatus includes a first radiation area, a phase adjustment area and a second radiation area. The first radiation area is disposed opposite to the second radiation area. The first radiation area is connected to one end of the phase adjustment area. The other end of the phase adjustment area is connected to the second radiation area. The first radiation area includes a feeding point of the antenna apparatus. The second radiation area includes a ground point of the antenna apparatus. The phase adjustment area is used to adjust a phase of a signal fed by the feeding point, to change a direction of a space electromagnetic field formed by an electromagnetic signal radiated by each of the first radiation area and the second radiation area.

Implementations of antennas may include a meandering T-matching structure, a first meandering feed line coupled to the meandering T-matching structure, and a first radiating part coupled to the first meandering feed line. Implementations may include a second meandering feed line coupled to the meandering T-matching structure, and a second radiating part coupled to the meandering feed line. A gap may physically separate the first meandering feed line and the second meandering feed line.

Implementations of antennas may include a meandering T-matching structure, a first meandering feed line coupled to the meandering T-matching structure, and a first radiating part coupled to the first meandering feed line. Implementations may include a second meandering feed line coupled to the meandering T-matching structure, and a second radiating part coupled to the meandering feed line. A gap may physically separate the first meandering feed line and the second meandering feed line.

An RFID integrated circuit, in addition to having conductive pads to electrically couple to an antenna, may also include a conductive bridge configured to electrically connect different portions of the antenna together. In some embodiments, the conductive bridge may be used to form a multi-turn antenna segment.

A filter assembly operating at wider passband with an enhanced reflection coefficient is provided herein. In certain embodiments, the filter assembly comprises a first filter configured to allow signals received via an antenna node to pass at a first passband, the first filter including a plurality of resonators connected in series and parallel arms, the plurality of resonators of the first filter including a first type of resonator configured to broaden the first passband, at least a series resonator nearest to the antenna node or a shunt resonator nearest to the antenna node among the plurality of resonators of the first filter being a second type of resonator configured to improve reflection characteristics at a stopband of the first filter, and a second filter configured to allow the signals received via the antenna node to pass at a second passband using the second type of resonators.