101 results about "Microwave frequency range" patented technology

The present invention provides an adaptive microwave oven capable of entering an operation mode which avoids interference with a communication device either upon detection of a communication from a communication device (e.g., a cordless telephone) operating in a microwave frequency range, or upon receipt of a command indicating the operation of a microwave device such as a cordless telephone through a suitable network (e.g., a piconet using BLUETOOTH Technology). In one embodiment, a cooking mode of a microwave oven is paused (or significantly reduced) to best avoid interference with microwave signals between a remote handset and a matching base unit of a cordless telephone. The activity of microwave communications within the vicinity of the adaptive microwave oven can be determined, e.g., using a passive cordless telephone receiver which detects communication activity in the microwave range, or using direct communications from the cordless telephone using a suitable wireless network, e.g., a piconet using BLUETOOTH technology. In another embodiment, the frequency of an adaptive microwave oven capable of generating microwave energy at any of a plurality of microwave frequency ranges is controlled in accordance with the microwave frequency used by an electronic device (e.g., a cordless telephone) in the vicinity of the adaptive microwave oven. In this embodiment, a cordless telephone receiver can provide a controller for the adaptive microwave oven with passively detected information regarding the frequency of communication traffic in the vicinity of the microwave oven, or a wireless network can be used to provide frequency information directly between the relevant electronic device (e.g., cordless telephone) and the adaptive microwave oven.

A method and apparatus is provided which employs phase or amplitude modulated electromagnetic probing waves (in optical or microwave frequency ranges or both) emitted toward a vibrating object. The optical and / or microwave probing signals remotely irradiate an object of interest. The object reflects and / or scatters the probing wave toward to a receiver. The reflected / scattered modulated signal is received with a remote sensor (receiver). Vibration causes additional phase modulation to the probing wave. At the receiving end, the signal is demodulated to extract and analyze the vibration waveform. The present invention can be utilized for nondestructive testing, monitoring of technological processes, structural integrity, noise and vibration control, mine detection, etc.

Various methods of metering a multi-phase composition in a pipe using patch antenna(s), that operate in a radio or microwave frequency range, are disclosed including locating and then exciting the patch antenna(s) over a range of frequencies; measuring transmitted and reflected signals over time; estimating a shift in a resonant frequency from a baseline resonant frequency; then calculating a permittivity of the composition, based on the shift; and calculating a phase composition of the multi-phase composition. The present invention has been described in terms of specific embodiment(s), and it is recognized that equivalents, alternatives, and modifications, aside from those expressly stated, are possible and within the scope of the appending claims.

The general field of the invention is that of devices for photonic generation of arbitrary microwave signals having linear frequency modulation, including a laser (1), an assembly (2) for shaping thetransmitted signal and a photoreceptor (3), the bandwidth of which is in the microwave frequency range. The shaping assembly comprises: a first optical splitter (20); a first optical pathway comprising a frequency-shifted loop including an optical splitter (50), a first optical amplifier (60), an optical isolator (70), a first spectral optical filter (75) and an acousto-optical frequency shifter (80); a second optical pathway comprising an electro-optical frequency shifter (30); a second optical splitter (40); a second optical amplifier (90); and a second optical filter (100); the acousto-optical shifting frequency, the electro-optical shifting frequency and the amplification gain of the first optical amplifier being adjustable.

Microwaveable container that provides for accelerated microwave cooking times and more uniform internal temperature distribution. The container is manufactured from a laminate structure, the laminate structure including a first layer of microwave-transparent material and a second layer of microwave-reflective material. The second layer has at least one aperture defined therein, the at least one aperture having a width dimension W, a length dimension L, and a perimeter dimension P. The aperture is sized such that at least one of the width dimension W or length dimension L is sized about an energy maximum. Accordingly, the width and / or the length dimension is defined as within ⅛λ of a predetermined dimension D. The predetermined dimension is equal to ¼λ+n(½)λ, wherein n is an integer and λ is a microwave wavelength associated with a predetermined range of microwave frequencies. Preferably, the predetermined range of microwave frequencies is between about 2.0-3.0 GHz.