Design of broadband, highly integrated, 20-30 GHz and 35-45 GHz MMIC up-converters
The design of broadband, highly integrated up-converters is described. Two up-converters have been designed to reduce the complexity and cost of broadband millimetre wave systems by integrating a number of functions into a compact MMIC. Broadband performance was achieved for 20-30 GHz and 35-45 GHz with OIP3 exceeding 24 and 15 dBm, respectively; 2xLO leakage better than 3 dBm and excellent gain control. To our knowledge, this is the highest level of integration achieved for an up-converter at these frequencies.
A Novel Non-Uniform Distributed Amplifier/Attenuator for Millimetre-wave Transmitter MMICs
A non-uniform distributed pHEMT amplifier/attenuator is presented. The topology ensures good intermodulation (OIP3 > 24 dBm) and more than 16 dB of dynamic rage. Rather than optimising the gate and drain transmission line lengths, this design varies transistor width, in both the amplifier and shunt-attenuator devices, to minimise width and maximise performance. These factors make the presented design useful for the construction of compact, high-performance millimetre-wave transmitter MMICs
Frequency selective surface design for blinds applications
In this paper, the reconfigurable blind structure with frequency selective surfaces(FSS) for the building applications are presented. Frequency transmission characteristics for different angles of the proposed blind-FSSs are investigated and verified through simulation and measurement. The simulation results show that we can implement the reconfigurable blind-FSS for multiband wireless applications. To verify the proposed paper, two kinds of blind-FSSs, crossed dipole FSS and circular ring FSS are fabricated and measurements are performed for different angles. The proposed structure in this paper which is very simple, can be easily applied to any planar surface for wireless security applications at low cost.