Techniques and configurations are disclosed for bulk acoustic wave resonator (BAWR) tuner circuits and their use in integrated circuit (IC) packages and mobile communication devices for radio frequency (RF) communication. In some embodiments, a mobile communication device may include an antenna; a transmitter circuit having an output port, a tuner circuit having one or more BAWRs, an antenna port coupled to the antenna, a transmitter port coupled to the output port of the transmitter circuit, and a control port; and a control circuit, coupled to the control port, configured to adjust an impedance of the tuner circuit, via adjustment of a BAWR or another component of the tuner circuit, based at least in part on an impedance of the antenna. Other embodiments may be described and/or claimed.

Described herein are architectures, platforms and methods for electrically tuning radiators in a portable device.

Described herein are architectures, platforms and methods for electrically tuning radiators in a portable device.

A multi-feed antenna is described where the antenna is optimized for the natural impedance state per frequency band. Multiple feed points are accessed as a function of frequency and use case to provide a feed port that is operating at the natural impedance state for the antenna structure. Impedance transforming circuits can be applied to the feed point to form impedance matching circuits to transform the antenna impedance to a characteristic impedance of the system or circuit interfacing with the antenna. The impedance transforming circuits can be eliminated and the RF circuitry interfacing with the antenna can be configured to operate at the natural frequency of the antenna.

A diversity antenna applied in a mobile terminal and a mobile terminal are provided. The mobile terminal includes a metal housing and the metal housing includes a housing body and a receiving region located over the housing body, and the receiving region is a frame structure in which a side is provided with a slit. The diversity antenna includes a feed point, a first ground point and a second ground point, and the feed point, the first ground point and the second ground point are all arranged on the housing body, and a distance between the feed point and the slit is 3 mm to 15 mm. The diversity antenna further includes a capacitive element connected to the frame structure and arranged in series with the feed point, and a switch arranged in series with the first ground point.

Provided is an LTE full-band cellphone antenna structure, including a ground plate, a circuit board having a feeding point, a feeding terminal matching circuit provided on the circuit board and a metal unit surrounding the circuit board and the ground plate. The metal unit includes a grounding portion electrically connected with the ground plate and a non-grounding portion electrically disconnected with the grounding portion. The feeding point is electrically connected with the non-grounding portion so that the non-grounding portion serves as a middle-high frequency radiator. A gap is provided between the non-grounding portion and the ground plate, and the ground plate is excited in a coupling manner so as to generate a current, such that the ground plate serves as a low frequency radiator. The antenna of the present disclosure covers all LTE frequency bands, which has advantages of less tuning difficulty and less influence by processing accuracy.

A metal body antenna using a housing unit and a battery cover as an antenna. The metal body antenna includes a radiation element supplied with a signal from a feeding power port, a ground coupled to the radiation element by loop coupling to generate an induction current, a frame bezel unit separated from the ground by a dielectric and a gap, and a connection line configured to connect the ground and the frame bezel unit and formed over the dielectric so that an electric current induced into the ground flows into the frame bezel unit, wherein an antenna having an electrical length of a half wavelength operates in a wideband. Accordingly, a bezel unit is effectively used, and a wideband and multi-band antenna structure having a radiation loss satisfies all of the Penta Band (i.e., GSM850, EGSM, DCS, PCS, and W2100), that is, bands chiefly used in mobile phones.

The cognitive radio antenna assembly includes two boards, a main board that has an ultra-wideband antenna (UWB) and also serves as a ground plane for the reconfigurable antenna, and an elevated MIMO board having two planar inverted-F antennas (PIFAs) that are reconfigurable to selectively operate on different frequency bands. Each PIFA has a radiating patch having a slot bridged by PIN diodes and DC blocking capacitors on opposite sides of the slot. The resonant frequency of each PIFA is controlled by which diodes are switched on and off. The PIFA antennas are shorted to the ground plane the (UWB antenna) on the main board by shorting walls. The PIFA antennas are capable of resonating from the 700 MHz band through 3000 MHz, while the UWB senses the spectrum over the entire bandwidth. The antenna assembly is compact, being suitable for cellular phone and wireless applications in 4G wireless standards.

Techniques, apparatus and systems that use composite left and right handed (CRLH) metamaterial structures to combine and divide electromagnetic signals at multiple frequencies. The metamaterial properties permit significant size reduction over a conventional N-way radial power combiner or divider. Dual-band serial power combiners and dividers and single-band and dual-band radial power combiners and dividers are described.

Techniques, apparatus and systems that use composite left and right handed (CRLH) metamaterial structures to combine and divide electromagnetic signals at multiple frequencies. The metamaterial properties permit significant size reduction over a conventional N-way radial power combiner or divider. Dual-band serial power combiners and dividers and single-band and dual-band radial power combiners and dividers are described.