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"That the automobile has practically reached the limit of its development is suggested by the fact that during the past year no improvements of a radical nature have been introduced."
Scientific American ; Jan. 2 edition, 1909
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| Number | Title | Issue Date |
| 7230384 | Robust RF interface in a TWT Apparatus and methods provide a robust radio frequency (RF) interface for a helix-type traveling wave tube (TWT). As a vacuum device, the RF input to the TWT and the RF output from the TWT are sealed to maintain the vacuum. The disclosed robust RF interface techniqu... | 06/12/2007 |
| 6005380 | Sensitive slot antenna including inductively coupled squid array A magnetic field sensor which can be used as an active antenna is disclosed that is capable of small size, ultrawideband operation, and high efficiency. The sensor includes a multiplicity of magnetic field transducers, e.g., superconducting quantum interf... | 12/21/1999 |
| 5936458 | Superconducting analog amplifier circuits Josephson transmission structures (JTSs) which include Josephson transmission lines (JTLs) with filter circuitry and flux release circuitry. Two or more of these JTSs may be interconnected to form a superconducting high-gain operational amplifier intended... | 08/10/1999 |
| 5844407 | Method using squid array for improving the sensitivity of a slot antenna A magnetic field sensor which can be used as an active antenna is disclosed that is capable of small size, ultrawideband operation, and high efficiency. The sensor includes a multiplicity of magnetic field transducers, e.g., superconducting quantum interf... | 12/01/1998 |
| 5378999 | Hybrid matrix amplifier The present invention comprises a novel matrix amplifier. The matrix amplifier includes an active superconducting power divider (ASPD) having N output ports; N distributed amplifiers each operatively connected to one of the N output ports of the ASPD; and... | 01/03/1995 |
| 4820688 | Traveling wave tube oscillator/amplifier with superconducting RF circuit Microwave oscillators and amplifiers which utilize a superconducting slow-wave circuit. The slow circuit is made from materials which exhibit superconductivity at relatively high critical temperatures. The slow wave circuit is integral with the device's v... | 04/11/1989 |
| 4638257 | Amplification by a phase locked array of Josephson junctions A Josephson junction amplifier comprising an array of series connected Josephson junctions which are maintained in a finite voltage, mutually electromagnetically phase-locked state. An input signal is applied across a first group of one or more but less t... | 01/20/1987 |
| 4585999 | Radiofrequency amplifier based on a dc superconducting quantum interference device A low noise radiofrequency amplifier (10), using a dc SQUID (superconducting quantum interference device) as the input amplifying element. The dc SQUID (11) and an input coil (12) are maintained at superconductivity temperatures in a superconducting shiel... | 04/29/1986 |
| 4509018 | Asymmetric superconducting quantum interference device in a linear amplifier circuit A superconducting quantum interference device (SQUID) is direct current biased through physical connections asymmetric to, and preferably maximally asymmetric to, the two Josephson junctions. The asymmetric SQUID so created is, responsively to such physic... | 04/02/1985 |
| 4456912 | High energy microwave defense system A defense system wherein a radar intercepts and follows a target and includes an antenna array and a low level source of microwave energy for exciting the elements of the array to produce radar returns and define the path. A microwave storage reservoir is... | 06/26/1984 |
| 4334158 | Superconducting switch and amplifier device An amplifying or switching superconductive device is described whose current-voltage characteristic is drastically altered by heavy injection of excess energetic quasi-particles. In this device, the superconducting bandgap of a superconducting layer is gr... | 06/08/1982 |
| 4274015 | Self-resetting Josephson digital current amplifier A self-resetting digital current amplifier which utilizes Josephson devices is disclosed. The basic circuit includes a pair of switchable Josephson devices connected to each other and with an output load. The first of these devices is switched by a combin... | 06/16/1981 |
| 4132956 | Circuit arrangement for amplifying high frequency electromagnetic waves A circuit for amplifying high frequency electromagnetic waves composed of a Josephson junction constituting an electromagnetic high frequency line along which electromagnetic waves can propagate at a signal frequency and at least one idler frequency, the ... | 01/02/1979 |
| 4055810 | Independent gain and bandwidth control of a traveling wave maser An X-band traveling wave maser of the folded-comb type is provided with two figure-eight coils for gain and bandwidth control. One figure-eight coil covers the full length of the comb structure for bandwidth adjustment of an external magnetic field. The o... | 10/25/1977 |
