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An active hybrid shared-aperture concept (employing both active and passive circuits) is presented. This active shared aperture realizes the required isolation level of 48 dB between transmit (TX) (30 GHz) and receive (RX) (20 GHz) channels of a ground terminal for two-way satellite communication. It can be applied in very small aperture terminals. The dual-frequency shared aperture can be used as...
The complexity of today's RF products is growing in such a way that taking into account the physical design effects in the early design phase is key to successful designing. In this paper, the currently used simulation methodology for RF design has been improved by taking parasitic effects (both on-chip and off-chip) into account and thus better predictability of silicon performance has been accomplished...
An 8–10 GHz linearised single-sideband Gilbert upconversion mixer is demonstrated in silicon BiCMOS technology. The QuBiC4X 0.25 μm BiCMOS process of NXP has been used. The device has an integrated local oscillator driver with polyphase quadrature generation. The IF chain uses feedback, selectable gain settings and DC offset circuitry to be compatible with more than one type of direct digital synthesizer...
An 8–10 GHz linearised single-sideband Gilbert upconversion mixer is demonstrated in silicon BiCMOS technology. The QuBiC4X 0.25 μm BiCMOS process of NXP has been used. The device has an integrated local oscillator driver with polyphase quadrature generation. The IF chain uses feedback, selectable gain settings and DC offset circuitry to be compatible with more than one type of direct digital synthesizer...
An LC VCO with a new varactorless frequency tuning technique is presented, which is suitable for microwave and millimetre-wave applications. The continuous frequency tuning with a small output power variation is achieved using tunable negative inductance and negative capacitance cells. Fabricated in a 0.35-μm SiGe BiCMOS process, the varactorless VCOs achieves a continuous tuning range of 15% from...
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