摘要:
Improved frequency characteristics can be achieved by using input/output pads on a surface mount block filter which pads are mounted on mesas formed by troughs cut through the dielectric material and metallization.
摘要:
Waveguide phase shifter (200, FIG. 2 and 300, FIG. 3) uses piezoelectric ceramics to implement a voltage variable actuator (270, 370) for moving at least one dielectric vane (255, 355) relative to a reference surface (206, 306) in a waveguide cavity (285, 385). In this manner, the phase shift in waveguide phase shifters (200, 300) is controlled. In one embodiment, actuator (270) comprises first piezoelectric wafer (210), second piezoelectric wafer (220), first metallic layer (230), second metallic layer (240), third metallic layer (250), mating surface (272) and spacer (265). Actuator (270) uses a stack of piezoelectric materials to establish a lever arm mechanism to establish vertical movement (294) and move dielectric vane (255). Actuator (370) uses a stack of piezoelectric materials to establish vertical movement (394) and move dielectric vane (355). Waveguide phase shifters (200, 300) are used in phased array antenna (400) operating at microwave frequencies.
摘要:
A laser tuning method for tuning a ceramic passband filter comprises forming an untuned filter that includes at least one metallized element, such as a resonator pad, formed of an undersized metal plate. A thick film of a metal powder paste is applied to the filter adjacent to the undersized plate. The paste film is scanned with a laser beam to sinter the metal particles into an integral plate, thereby adjusting the size and shape of the element to obtain a desired performance characteristic. In one aspect of this invention, an output signal in response to a test signal is monitored while laser scanning the paste film, whereupon the laser beam is discontinued when the desired characteristic has been obtained.
摘要:
A two piece split bearing assembly is provided and consists of an outer race ring, an inner race ring and a plurality of antifriction elements all split in half. A male V-groove is formed on each end of one half of the outer race ring and the inner race ring while a female V-groove is formed on each end of other half of the outer race ring and inner race ring. When the two halves of the inner race ring and outer race ring are mated together with the antifriction elements between they will form the bearing assembly.
摘要:
A manually-operated device for applying a very thin material, such as roll leaf, from a roll onto a flat surface so as to imprint the material and produce an artistic result. The device has a dispenser for holding the roll of material, and the material is guided through a predetermined path under a heated stamping roller, the temperature of which is automatically controlled and maintained at a desired temperature. By using handles on the sides of the device, the user advances the roller over the material, which is dispensed smoothly, so as to apply the material to the selected surface. The device includes a manually-operated cutter to facilitate cutting of the material on a straight line when the desired amount has been applied.
摘要:
A remote control and method of using the remote control are provided. The remote control includes a microprocessor, a memory accessible by the microprocessor that includes a database of a plurality of favorite channels, a user interface in signal communication with the microprocessor that allows selection of successive next or previous favorite channels, and a transmitter controlled by the microprocessor that, responsive to user activation of the user interface, transmits wireless signals corresponding to the successive next or previous favorite channel. In an example embodiment, an icon is associated with each favorite channel and the remote includes a display screen that displays the icon associated with the successive next or previous favorite channel when the user interface is activated. The method of using the remote control includes activating the user interface to select a next favorite channel.
摘要:
Repeater systems and methods for coupling a home automation control signal from a first power line operating on a first phase to a second power line operating on a second phase are provided. A power line control repeater includes a power line control signal transceiver, a wireless signal transmitter, a wireless signal receiver, and a processor. The processor is configured to instruct the transmitting component to transmit wireless signals based on power line signals detected by the power line control signal transceiver and further configured to identify wireless signals received at the wireless signal receiver from a similarly configured repeater and to instruct the transceiver to modulate the power signal based on the received signals. A system includes two repeaters in wireless signal communication.
摘要:
The present invention provides at least two input driving sections for a piezoelectric transformer. The two input driving sections are configured in a stacked configuration, with either one section on top of the other or the sections interlaced. Each input driving section includes a pair of electrodes. All of the electrodes preferably have a distinct electrode shape. The two input driving sections provide for the application of phase-modulated input signals to control the gain or amplitude of the transformer output.
摘要:
A remote control for appending commands into a learned macro routine of commands is provided. A receiver is arranged to receive signals from one or more remote controls, wherein the signals represent one or more commands comprising a macro. The remote control stores the macro in memory and has “learned” the received macro. The learned macro can be modified by appending one or more additional commands into the macro using commands already contained within the remote control.
摘要:
A piezoelectric actuator control circuit includes a first conductor attached to the free end of a piezoelectric device and a second conductor rigidly fixed at a position spaced from the piezoelectric device such that a variable capacitor is created between the first and second conductors. The variable capacitor is then used in a capacitive voltage divider to generate a drive signal which moves the piezoelectric device. Thus, the movement of the piezoelectric device can be precisely controlled. The control circuit allows for precise control of an array of such piezoelectric actuators and is particularly applicable to the use of actuators for controlling a mmWave phase array antenna.