Passive microwave devices

Josephson junctions for passive microwave devices, satellite-communication systems, and computer logic gates. 

Lorenz, M. Hochmuth, H. Natusch, D. Lippold, G. Svetchnikov, V. L. Kaiser, T. Hein, M. A. Schwab, R. Heidinger, R. 1999. Ag-doped double-sided PLD-YBCO thin films for passive microwave devices in future communication systems. IEEE Trans. Appl. Supercond. 9 1936-1939. 

Specific properties of superconductors at 77 K may be used for electronic applications, e.g., for passive microwave devices such as transmission lines and high-quality resonators. YBCO is widely used in active devices such as SQUIDs and detectors based on Joseph-son and quasi-particle tunnelling. A further field of... 

Many of these steps include CVD, and CVD is now a major process in the fabrication of monolithic integrated circuits (IC), custom and semi-custom ASIC s, active discrete devices, transistors, diodes, passive devices and networks, hybrid IC s, opto-elec-tronic devices, energy-conversion devices, and microwave devices. 

Transmission Line Sections Discontinuities Impedance Transformers Terminations Attenuators Microwave Resonators Tuning Elements Hybrid Circuits and Directional Couplers Filters Ferrite Components Passive Semiconductor Devices... 

Ceramic interconnect technologies are capable of integrating various components, such as passive components, RF/microwave devices, ICs, and transmission lines on and/or in a ceramic substrate, forming electronic modules that provide certain functions. Recently, millions of such functional modules have been commercialized in the automotive industry, consumer... 

Within the frequency range up to 200 GHz the klystron can be replaced (at a price) by synthesisers, coupled with solid state microwave amplifiers and passive or active frequency multipliers. These devices have very high frequency stability, are easily modulated either in frequency or power, and are readily compatible with computer control of all their main fbnctions. The klystron is gradually becoming redundant, but has an honoured place in the development of microwave spectroscopy. 

With the progress in microwave telecommunication technology, dielectric materials have come to play an important role in the miniaturization and compactness of microwave passive components. The dielectric materials available for micro-wave devices are required to have predictable properties with respect to a high dielectric constant (K), high quality factor (Qf), and small temperature coefficient of resonant frequency (TCP). Numerous microwave dielectric materials have been prepared and investigated for their microwave dielectric properties and for satisfying these requirements. In particular, complex perovskite compounds A(B,B )03... 

Products closest to commercial production are SQUlDs - " and a microwave passive device. A SQUID is a superconducting device containing one or two... 

The varied devices previously discussed may be combined with other active or passive circuit elements to make integrated circuits. The major of ICs using III-V materials are Digital ICs, monolithic microwave integrated circuits (MMICs) and opto-electronic integrated circuits (OEICs). 

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