Class / Patent application number | Description | Number of patent applications / Date published |
333024000 |
COUPLING NETWORKS
| 2254 |
333001000 |
PLURAL CHANNEL SYSTEMS
| 1187 |
333236000 |
LONG LINES
| 254 |
333245000 |
LONG LINE ELEMENTS AND COMPONENTS
| 155 |
333219000 |
RESONATORS (DISTRIBUTED PARAMETER TYPE)
| 135 |
333170100 |
AUTOMATICALLY CONTROLLED SYSTEMS
| 115 |
333012000 |
TRANSMISSION LINE INDUCTIVE OR RADIATION INTERFERENCE REDUCTION SYSTEMS
| 74 |
333081000 |
ATTENUATORS
| 63 |
333021000 |
WAVE MODE CONVERTERS
| 37 |
333022000 |
DISSIPATING TERMINATIONS FOR LONG LINES
| 20 |
333213000 |
NEGATIVE RESISTANCE OR REACTANCE NETWORKS OF THE ACTIVE TYPE
| 12 |
333020000 |
WAVE-SHAPING
| 11 |
333099000 |
MISCELLANEOUS
| 10 |
333218000 |
FREQUENCY MULTIPLIERS | 3 |
20100073110 | SOLID STATE TERAHERTZ RADIATION FREQUENCY MULTIPLIER - A nonlinear solid-state device useful for frequency conversion of electromagnetic radiation and in particular for harmonic generation, comprising a waveguiding electromagnetically distributed structure (WEDS) which includes monolithically a synthetic nonlinear material (SNM). Input radiation coupled into the WEDS is converted into a higher frequency output radiation through a constricted oscillatory motion of charge carriers and phase matched harmonic frequency generation of radiation which builds up coherently over an interaction length many time larger than the radiation wavelengths. In one embodiment, microwave radiation is converted into terahertz radiation. In other embodiments, SNM based WEDS devices are adapted for frequency mixing and parametric oscillation. | 03-25-2010 |
20120146747 | MILLIMETER-WAVE WIDEBAND FREQUENCY DOUBLER - A millimeter-wave wideband frequency doubler stage for use in a distributed frequency doubler includes: a differential input pair of transistors, each transistor having respective gate, drain and source terminals, wherein the source terminals are coupled together to a first power supply node and the drain terminals are coupled together at a first node to a second power supply node; first and second pairs of bandpass gate lines coupled to the gate terminals of the transistors; and a pair of bandpass drain lines coupled to the drain terminals of the transistors. | 06-14-2012 |
20150357992 | FREQUENCY DIVIDER APPARATUS - A frequency divider apparatus includes a micro-electro-mechanical system (“MEMS”) divider that is configured to be driven by an input signal. The MEMS divider includes a passive mechanical device that generates multiple output signals. Each of the output signals has a frequency less than a frequency of the input signal. | 12-10-2015 |
333014000 |
AMPLITUDE COMPRESSION AND EXPANSION SYSTEMS (I.E., COMPANDERS) | 1 |
20120182081 | Dynamic Range Compression Circuit and Class D Amplifier - A dynamic range compression circuit includes an attenuator that attenuates a signal at a predetermined node in an amplifier to reduce a gain of the amplifier and a gain controller that reduces the gain of the amplifier by the attenuator so that an amplitude of an output signal of the amplifier becomes an arbitrary output limit voltage in a case where an input signal having the same amplitude as that of an input-stage maximum voltage of the amplifier is input into the amplifier, and increases the gain of the amplifier by reducing a degree of attenuation of the attenuator according to a decrease of the amplitude of the input signal of the amplifier from the input-stage maximum voltage in a case where the amplitude of the input signal of the amplifier is smaller than the input-stage maximum voltage. | 07-19-2012 |
333023000 |
ARTIFICIAL LINES | 1 |
20130207737 | WIDEBAND NEGATIVE-PERMITTIVITY AND NEGATIVE-PERMEABILITY METAMATERIALS UTILIZING NON-FOSTER ELEMENTS - A metamaterial simultaneously exhibiting a relative effective permeability and a relative effective permittivity below unity over a wide bandwidth, including: one of a two-dimensional and a three-dimensional arrangement of unit cells, wherein each of the unit cells has a magnetic dipole moment and an electric dipole moment that are dependent upon one or more of an incident magnetic field and an incident electric field; and a coupling mechanism operable for coupling one or more of the incident magnetic field and the incident electric field to one or more devices. Optionally, the coupling mechanism includes one or more of a split ring and a pair of parallel plates coupled by one of a rod and a wire. The one or more devices are non-Foster elements. | 08-15-2013 |