Abstract: The invention provides a phase shifter with flexible control voltage that is useful with all RF systems that phase shift a RF signal. The phase shifter according to the present invention may comprise transistors used as switching elements. In one aspect, the phase shifter provides the option of controlling a phase shifter with either a positive or a negative voltage control signal. For example, the dc ground of the transistors included in the phase shifter may be floated, either fixed or adjusted. The RF grounding of the transistors may be achieved by in-band resonant capacitors. Thus, the control voltage provided to the transistors is flexible in that it may be connected to a positive or negative control voltage, or it may be connected to ground, or it may swing from a positive control voltage to a negative control voltage or vice versa.

Abstract: The invention provides a phase shifter with flexible control voltage that is useful with all RF systems that phase shift a RF signal. The phase shifter according to the present invention may comprise transistors used as switching elements. In one aspect, the phase shifter provides the option of controlling a phase shifter with either a positive or a negative voltage control signal. For example, the dc ground of the transistors included in the phase shifter may be floated, either fixed or adjusted. The RF grounding of the transistors may be achieved by in-band resonant capacitors. Thus, the control voltage provided to the transistors is flexible in that it may be connected to a positive or negative control voltage, or it may be connected to ground, or it may swing from a positive control voltage to a negative control voltage or vice versa.

Abstract: The invention provides a phase shifter with flexible control voltage that is useful with all RF systems that phase shift a RF signal. The phase shifter according to the present invention may comprise transistors used as switching elements. In one aspect, the phase shifter provides the option of controlling a phase shifter with either a positive or a negative voltage control signal. For example, the dc ground of the transistors included in the phase shifter may be floated, either fixed or adjusted. The RF grounding of the transistors may be achieved by in-band resonant capacitors. Thus, the control voltage provided to the transistors is flexible in that it may be connected to a positive or negative control voltage, or it may be connected to ground, or it may swing from a positive control voltage to a negative control voltage or vice versa.

Abstract: The invention provides a phase shifter with flexible control voltage that is useful with all RF systems that phase shift a RF signal. The phase shifter according to the present invention may comprise transistors used as switching elements. In one aspect, the phase shifter provides the option of controlling a phase shifter with either a positive or a negative voltage control signal. For example, the dc ground of the transistors included in the phase shifter may be floated, either fixed or adjusted. The RF grounding of the transistors may be achieved by in-band resonant capacitors. Thus, the control voltage provided to the transistors is flexible in that it may be connected to a positive or negative control voltage, or it may be connected to ground, or it may swing from a positive control voltage to a negative control voltage or vice versa.

Abstract: The invention provides a phase shifter with flexible control voltage that is useful with all RF systems that phase shift a RF signal. The phase shifter according to the present invention may comprise transistors used as switching elements. In one aspect, the phase shifter provides the option of controlling a phase shifter with either a positive or a negative voltage control signal. For example, the dc ground of the transistors included in the phase shifter may be floated i.e. fixed or adjusted. The RF grounding of the transistors may be achieved by in-band resonant capacitors. Thus, the control voltage provided to the transistors is flexible in that it may be connected to a positive or negative control voltage, or it may be connected to ground, or it may swing from a positive control voltage to a negative control voltage or vice versa.

Abstract: The invention provides a phase shifter with flexible control voltage that is useful with all RF systems that phase shift a RF signal. The phase shifter according to the present invention may comprise transistors used as switching elements. In one aspect, the phase shifter provides the option of controlling a phase shifter with either a positive or a negative voltage control signal. For example, the dc ground of the transistors included in the phase shifter may be floated. The RF grounding of the transistors may be achieved by in-band resonant capacitors. Thus, the control voltage provided to the transistors is flexible in that it may be connected to a positive or negative control voltage, or it may be connected to ground, or it may swing from a positive control voltage to a negative control voltage or vice versa.

Abstract: The invention provides a frequency doubler which uses an input tuning circuit configured to provide a low-pass frequency response and an input circuit configured to provide a high pass frequency response, where each tuning circuit drives a nonlinear device. The two nonlinear devices are fed 180 degrees out of phase, such that the even harmonics produced by the two non-linear devices are in phase while the odd harmonics produced by the non-linear devices are out of phase. The signals from the non-linear devices are combined into a single node producing a signal with a frequency that is twice the input frequency of the input signal.