Abstract: A support structure for at least partially supporting a user's head is described. The support structure comprises a frame having a head engaging portion and a shoulder engaging portion, the shoulder engaging portion adapted to spread the load of the user's head over a user's shoulder, the frame being shaped to the contour of the user's body from the head engaging portion to the shoulder engaging portion.

Abstract: A dry fog diffuser comprises a support. A shroud is mounted to the support. The shroud comprises a tubular elbow having an inlet end and an outlet end. The shroud is mounted with a long side of the elbow including a drain port facing downward. An atomizing nozzle is mounted at the inlet end of the elbow and aligned with an axis of the elbow at the inlet end. The nozzle is connected, in use, to a water supply and an air supply. The diffuser produces a dry fog exiting shroud at the outlet end of the tubular elbow.

Abstract: A support structure for at least partially supporting a user's head is described. The support structure comprises a frame having a head engaging portion and a shoulder engaging portion, the shoulder engaging portion adapted to spread the load of the user's head over a user's shoulder, the frame being shaped to the contour of the user's body from the head engaging portion to the shoulder engaging portion.

Abstract: A dry fog diffuser comprises a support. A shroud is mounted to the support. The shroud comprises a tubular elbow having an inlet end and an outlet end. The shroud is mounted with a long side of the elbow including a drain port facing downward. An atomizing nozzle is mounted at the inlet end of the elbow and aligned with an axis of the elbow at the inlet end. The nozzle is connected, in use, to a water supply and an air supply. The diffuser produces a dry fog exiting shroud at the outlet end of the tubular elbow.

Abstract: A mobile wireless communications device includes a housing an antenna, and radio frequency (RF) circuitry. A transceiver is connected to the antenna and a processor is operative with the RF circuitry. The transceiver includes an In-phase and Quadrature (I/Q) Modulation and Power Amplification circuit having an In-phase (I) circuit with a modulator mixer and power amplifier circuit. A Quadrature (Q) circuit includes a modulator mixer and power amplifier circuit. A power combiner receives the separately amplified In-phase and Quadrature signals and sums and outputs the signals as a combined I and Q signal. The I and Q circuits are isolated from the combined I and Q signal to enhance antenna matching and transmitted radiated power (TRP) and reduce harmonic emission from the power amplification circuits.

Abstract: A support structure for at least partially supporting a user's head is described. The support structure comprises a frame having a head engaging portion and a shoulder engaging portion, the shoulder engaging portion adapted to spread the load of the user's head over a user's shoulder, the frame being shaped to the contour of the user's body from the head engaging portion to the shoulder engaging portion.

Abstract: In accordance with a non-limiting aspect, a mobile wireless communications device includes a housing, at least one circuit board carried by the housing, radio frequency (RF) circuitry, and a processor. An antenna is operative with the RF circuitry. A charging circuit charges a battery carried by and powers the device and includes at least one charging contact carried by the housing and configured for engaging an external charging cradle when connected thereto. It includes an internal connector extending to at least one circuit board and connecting to the charging circuitry. An RF filter includes a ferrite material surrounding at least a portion of the internal connector to minimize RE coupling from the at least one charging contact to the antenna and reduce transmitter harmonics emission and receiver de-sense.

Abstract: A mobile wireless communications device may include a portable device housing, wireless communications circuitry carried by the portable device housing, and a self-contained rechargeable battery pack carried by the portable housing for powering the wireless communications circuitry. The self-contained rechargeable battery pack may include a battery casing, at least one internal battery cell carried within the battery casing, internal battery circuitry carried within the battery casing, and at least one internal filter element carried within the battery casing and coupled to the internal battery circuitry.

Abstract: A mobile wireless communications device includes a housing and circuit board carried by the housing. RF circuitry and a processor are operative with each other and carried by the circuit board. A receiver speaker and microphone are carried by the housing. Audio circuitry is carried by the circuit board and operative with the RF circuitry and processor. A microphone audio switch and receiver speaker audio switch are carried by the circuit board and are connected with audio connection lines that interconnect the processor. A filter is operative with the audio connection lines and operatively connected to at least one of the microphone audio switch or receiver speaker audio switch to reduce conducted and radiated interfering RF energy from coupling into the audio circuitry.

Abstract: A telephone to be connected to a wireline having reduced sensitivity to RF interference over a predetermined frequency range from an adjacent mobile wireless communications device may include a transmit amplifier, a receive amplifier, an audio input transducer connected to the transmit amplifier, and an audio output transducer connected to the receive amplifier. The telephone may further include an RF shield(s) surrounding the audio input transducer and the audio output transducer for reducing RF interference over the predetermined frequency range from the adjacent mobile wireless communications device. Moreover, the telephone may also include at least one RF audio input filter element connected to the audio input transducer and at least one RF audio output filter element connected to the audio output transducer, both of which are also for reducing RF interference over the predetermined frequency range from the adjacent mobile wireless communications device.

Abstract: A portable audio device having reduced sensitivity to RF interference over a predetermined frequency range from an adjacent mobile wireless communications device may include a portable housing, a battery carried thereby, a recharging power input connected to the battery, a digital signal input, and an audio analog signal output. A digital-to-analog converter (DAC) may be carried by the portable housing and powered by the battery for converting a selected digital audio file from a memory into an analog audio signal. An audio analog amplifier may be connected between the DAC and the audio analog signal output. A first RF filter(s) may be connected to the recharging power input, and a second RF filter(s) may be connected to the audio analog signal output, both for reducing RF interference over the predetermined frequency range from the adjacent mobile wireless communications device.

Abstract: The disclosure relates to an electronic circuit for attenuating harmonics in a power amplifier. The circuit comprises: a printed circuit board (PCB); a first electrical track in the PCB providing a connection from a high band power input terminal of the amplifier to a battery terminal; a first capacitor connected to the first track, the high band power input terminal and a ground reference in the PCB; a first high filter choke connected to the first track and to the terminal; a second electrical track connected to a low band power input terminal of the amplifier; a circuit implemented on the PCB and connected to an output terminal of the amplifier for an output signal from the amplifier, comprising a first filter and a low pass filter, the first filter connected to a 0 ohm resistor which is connected to the low pass filter.

Abstract: A mobile wireless communications device and associated method of making same includes a housing and circuit board having a ground plane. Radio frequency (RF) circuitry and a processor are carried by the circuit board and operative with each other. An antenna is carried by the housing and operative with the RF circuitry. Audio circuitry is carried by the circuit board and operative with the RF circuitry and processor. An audio transducer assembly such as a receiver is carried by the circuit board and engages audio circuitry for carrying audio signals between the audio circuitry and speaker. A filter is mounted at the speaker for blocking RF energy from the antenna through the speaker to the ground plane and decoupling the antenna from the speaker and any other components on the circuit board to minimize any detuning of antenna impedance match and degradation in antenna gain.

Abstract: A mobile wireless communications device includes a housing, antenna, and circuit board carried by the housing and having radio frequency (RF) circuitry operative with the antenna for receiving and transmitting RF signals through the antenna. A power amplifier is connected within a transmission line for amplifying RF signals to be transmitted over the transmission line to the antenna. An antenna switch is connected to the antenna and RF circuitry. An RF shield surrounds the power amplifier and antenna switch and isolates the power amplifier and antenna switch from the antenna and RF circuitry. A low pass filter is connected to the power amplifier and antenna switch for reducing any RF coupling of voltage standing waves of upper harmonic frequencies from the power amplifier into the antenna switch through the RF shield while maintaining transmission of signals through the transmission line at a desired fundamental frequency.

Abstract: A mobile wireless communications device includes a housing an antenna, and radio frequency (RF) circuitry. A transceiver is connected to the antenna and a processor is operative with the RF circuitry. The transceiver includes an In-phase and Quadrature (I/Q) Modulation and Power Amplification circuit having an In-phase (I) circuit with a modulator mixer and power amplifier circuit. A Quadrature (Q) circuit includes a modulator mixer and power amplifier circuit. A power combiner receives the separately amplified In-phase and Quadrature signals and sums and outputs the signals as a combined I and Q signal. The I and Q circuits are isolated from the combined I and Q signal to enhance antenna matching and transmitted radiated power (TRP) and reduce harmonic emission from the power amplification circuits.

Abstract: A mobile wireless communications device includes a housing and circuit board carried by the housing and having RF circuitry comprising at least one RF component and plurality of other components mounted on the circuit board. An RF metal shield is secured to the circuit board and surrounds and isolates the at least one RF component and plurality of other components within the RF metal shield. An RF absorber is positioned adjacent an area of the RF component that radiates energy to aid in reducing energy radiated from the RF component into the RF metal shield.

Abstract: A wireless headset has improved immunity to RF electromagnetic interference produced from wireless communications devices. A headset body is adapted to be worn by a user and includes a microphone and earpiece. An antenna receives wireless communication signals and passes them to RF and audio circuitry mounted within the headset body. The RF and audio circuitry include a Bluetooth module operatively connected to the antenna for transmitting and receiving wireless communication signals, an audio CODEC connected to the Bluetooth module, and audio connection lines connected between the CODEC and the earpiece and between the CODEC and the microphone. A filter is connected into each of the audio connection lines at the earpiece and microphone and operative for reducing the RF coupling from a mobile wireless communications device.

Abstract: The disclosure relates to an electronic circuit for attenuating harmonics in a power amplifier. The circuit comprises: a printed circuit board (PCB); a first electrical track in the PCB providing a connection from a high band power input terminal of the amplifier to a battery terminal; a first capacitor connected to the first track, the high band power input terminal and a ground reference in the PCB; a first high filter choke connected to the first track and to the terminal; a second electrical track connected to a low band power input terminal of the amplifier; a circuit implemented on the PCB and connected to an output terminal of the amplifier for an output signal from the amplifier, comprising a first filter and a low pass filter, the first filter connected to a 0 ohm resistor which is connected to the low pass filter.