Abstract: An apparatus comprising at least one antenna for transmission and/or reception of circularly polarized electromagnetic radiation. The antenna includes a radiating element, a static element, and a single feed line. The single feed line is coupled between the radiating element and a circuit that drives the antenna. The radiating element has a non-symmetrical outer perimeter shape. The radiating element may include an aperture. The antenna may further include a ground element and a supplemental ground feed structure, the supplemental ground feed structure located between the radiating element and the ground element and the radiating element located between the supplemental ground feed structure and the static element.

Abstract: An apparatus comprising at least one antenna for transmission and/or reception of circularly polarized electromagnetic radiation. The antenna includes a radiating element and a single feed line. The single feed line is coupled between the radiating element and a circuit that drives the antenna. The radiating element has a non-symmetrical outer perimeter shape. The radiating element may include an aperture. The antenna may further include a ground element and a supplemental ground feed structure, the supplemental ground feed structure located between the radiating element and the ground element.

Abstract: Techniques to maintain gain flatness in the frequency response of a passband signal over a circuit chain. The techniques may be employed in the receive chain of a millimeter wave band wireless receiver, in the transmit chain of a millimeter wave band wireless transmitter, or in both the receive chain and the transmit chain of a millimeter wave band wireless transceiver. The techniques include mismatching the input and output impedance of a passive low pass filter used in the chain to peak the gain of the passband signal at or near the cutoff frequency (Fc) of the filter.

Abstract: An apparatus that includes three or more antennas and an integrated circuit selects antennas for use, i.e., for transmission and reception of electromagnetic radiation. The apparatus selects, at a first time, from the three or more antennas, two antennas having approximately the same feed line length so that the two antennas operate at the same phase and at a first angle. The apparatus selects, at a second time that is different than the first time, from the three or more antennas, two antennas having different feed line lengths so that the two antennas selected for use at the second time operate at different phases and at a second angle that is different than the first angle. In this manner the apparatus may change the pattern and/or shape of electromagnetic radiation transmitted by the apparatus by selecting for use particular antennas having different feed line lengths.

Abstract: An apparatus for reducing interference and improving communication quality for RF communications over mm-wave frequency bands between wireless communications devices. In one embodiment, for example, the apparatus comprises a plurality of high-gain directional antenna elements each configured to maximally radiate in different directions relative to the apparatus. The apparatus also includes a RFIC chip electrically coupled to the plurality of antenna elements and configured to switch from driving any one of the directional antenna elements to driving another of the directional antenna elements thereby providing a multi-directional or near omni-directional radiation capability for a wireless communications device.

Abstract: An apparatus with a multi-varactor circuit for suppressing VCO gain is described herein. According to an embodiment, the apparatus comprises a plurality of varactor stages that are electrically coupled in parallel. For two or more varactor stages of the plurality of varactor stages, each respective varactor stage of the two or more varactor stages includes a set of one or more varactors that are electrically coupled to a tuning source. Each respective varactor stage of the two or more varactor stages is configured to vary a respective capacitance based on a tuning voltage from the tuning source and to be biased at a different respective voltage level. In other embodiments, the set of one or more varactors for each varactor stage of the two or more varactor stages includes at least one digitally-controlled switched varactor. The digitally-controlled switched varactors may be selectively connected to the tuning source.

Abstract: An approach is provided for managing power consumption in mobile devices configured with a plurality of directional antenna elements and a radio frequency integrated circuit (RFIC). The RFIC is configured to select for use, by the mobile device, a first set of one or more directional antenna elements from the plurality of directional antenna elements based upon selection criteria that include at least one or more power consumption criteria and one or more of one or more performance criteria or one or more interference avoidance criteria.

Abstract: An apparatus comprising at least one antenna for transmission and/or reception of circularly polarized electromagnetic radiation. The antenna includes a radiating element, a static element, and a single feed line. The single feed line is coupled between the radiating element and a circuit that drives the antenna. The radiating element has a non-symmetrical outer perimeter shape. The radiating element may include an aperture. The antenna may further include a ground element and a supplemental ground feed structure, the supplemental ground feed structure located between the radiating element and the ground element and the radiating element located between the supplemental ground feed structure and the static element.

Abstract: An apparatus comprising at least one antenna for transmission and/or reception of circularly polarized electromagnetic radiation. The antenna includes a radiating element and a single feed line. The single feed line is coupled between the radiating element and a circuit that drives the antenna. The radiating element has a non-symmetrical outer perimeter shape. The radiating element may include an aperture. The antenna may further include a ground element and a supplemental ground feed structure, the supplemental ground feed structure located between the radiating element and the ground element.

Abstract: An apparatus that includes three or more antennas and an integrated circuit selects antennas for use, i.e., for transmission and reception of electromagnetic radiation. The apparatus selects, at a first time, from the three or more antennas, two antennas having approximately the same feed line length so that the two antennas operate at the same phase and at a first angle. The apparatus selects, at a second time that is different than the first time, from the three or more antennas, two antennas having different feed line lengths so that the two antennas selected for use at the second time operate at different phases and at a second angle that is different than the first angle. In this manner the apparatus may change the pattern and/or shape of electromagnetic radiation transmitted by the apparatus by selecting for use particular antennas having different feed line lengths.

Abstract: An apparatus with a multi-varactor circuit for suppressing VCO gain is described herein. According to an embodiment, the apparatus comprises a plurality of varactor stages that are electrically coupled in parallel. For two or more varactor stages of the plurality of varactor stages, each respective varactor stage of the two or more varactor stages includes a set of one or more varactors that are electrically coupled to a tuning source. Each respective varactor stage of the two or more varactor stages is configured to vary a respective capacitance based on a tuning voltage from the tuning source and to be biased at a different respective voltage level. In other embodiments, the set of one or more varactors for each varactor stage of the two or more varactor stages includes at least one digitally-controlled switched varactor. The digitally-controlled switched varactors may be selectively connected to the tuning source.

Abstract: An apparatus for reducing interference and improving communication quality for RF communications over mm-wave frequency bands between wireless communications devices. In one embodiment, for example, the apparatus comprises a plurality of high-gain directional antenna elements each configured to maximally radiate in different directions relative to the apparatus. The apparatus also includes a RFIC chip electrically coupled to the plurality of antenna elements and configured to switch from driving any one of the directional antenna elements to driving another of the directional antenna elements thereby providing a multi-directional or near omni-directional radiation capability for a wireless communications device.

Abstract: Techniques to maintain gain flatness in the frequency response of a passband signal over a circuit chain. The techniques may be employed in the receive chain of a millimeter wave band wireless receiver, in the transmit chain of a millimeter wave band wireless transmitter, or in both the receive chain and the transmit chain of a millimeter wave band wireless transceiver. The techniques include mismatching the input and output impedance of a passive low pass filter used in the chain to peak the gain of the passband signal at or near the cutoff frequency (Fc) of the filter.

Abstract: A high frequency power FET device (22) is integrated with passive components (23,24,26,28,31), an electro-static discharge (ESD) device (27,127,227), and/or a logic structure (29) on a semiconductor body (13) to form a monolithic high frequency integrated circuit structure (10). The high frequency power FET device (22) includes a grounded source configuration. The logic structure (29) utilizes the high frequency power FET structure in a grounded source configuration as one device in a CMOS implementation.

Abstract: The amplifier (201) uses transistors (401,403) such as MOSFET transistors in a current mirror configuration. The transistors (401,403) are easy to package as surface mount devices. The drain port of the first transistor is coupled to an output signal (207) and a bias input signal (VB+). A gate port of the first transistor is coupled to a bias control input (117) and the signal input (115). The source of the first transistor and the source of the second transistor are coupled to an electrical ground (409). A first end of a resistive device (411) is coupled to the gate port and the drain port of the second transistor and a second end of the resistive device (411) is coupled the signal input (115) and the bias control input (117). This amplifier (201) has low sensitivity to the variations of the bias current to the control signal threshold, making the amplifier ideal for use in a radiotelephone (103).