Patent application number | Description | Published |
20110148578 | AUTOMOTIVE DIRECTION FINDING SYSTEM BASED ON RECEIVED POWER LEVELS - A system is provided for locating a vehicle. The system comprises a transmission device such as a key fob for transmission and receiving of a signal. Typically the key fob has a plurality of indicators such as LED indicators arranged in a circle. The key fob is adapted to transmit a radio frequency or microwave frequency transmission signal. An antenna array is positioned on or in a vehicle. The array comprises a plurality of antennas, generally arranged in a circular pattern. The array is adapted to receive the transmission signal from the transmission device which is converted to be analyzed by a microcontroller unit (MCU). The MCU is adapted to: (i) receive digital data converted from the transmission signal, (ii) calculate an angle of arrival (AOA) or direction of arrival (DOA) based on known components and an algorithm, and (iii) transmit a selection signal back to the key fob. A signal processing unit is coupled to the plurality of antennas and the MCU. The signal processing unit is adapted to receive the signal transmission from each antenna, convert the signal to digital data, and transmit the digital data to the MCU. | 06-23-2011 |
20120139793 | HIGH ISOLATION MULTIBAND MIMO ANTENNA SYSTEM - The high isolation multiband MIMO antenna system is a multi-band dual and quad antenna for multiple-input-multiple-output (MIMO) antenna systems. Element and ground plane geometries that can cover a wide range of frequency bands (780 MHz-5850 MHz) are based on the varying some simple geometrical lengths and widths of the elements and ground planes. The MIMO antenna systems can be used for next generation cellular and wireless MIMO communication systems. Several isolation enhancement schemes increase the isolation between adjacent antenna elements. Any combination of the isolation and MIMO antenna system geometries can be created to support different wireless system standards. The novel MIMO antenna systems are disposed within a dielectric substrate area of 50×100 mm | 06-07-2012 |
20120144160 | MULTIPLE-CYCLE PROGRAMMABLE PROCESSOR - The multi-cycle programmable processor emulates the features of a conventional microprocessor. Processor hardware functional units include a program counter (instruction pointer), an arithmetic and logic unit, an accumulator, an instruction register, a 2×1 multiplexer, 2×4 decoder, 1×2 decoder, an AND gate and an OR gate. Additionally, a controller modeled by a finite state machine (FSM) is operably connected to the microprocessor functional units and has a plurality of states that defines the operation of the microprocessor functional units. Each control state of the FSM implements the transfer of information between the registers of the datapath. The execution sequences through three states: an instruction fetch; an instruction decode; and instruction execute. The controller issues the required signals to the various hardware components to execute the instruction needed in three clock cycles. | 06-07-2012 |
20130234896 | DUAL-BAND MIMO ANTENNA SYSTEM - The dual-band MIMO antenna system includes antenna elements arranged on a printed circuit board. For the plurality of antennas on the board, the opposing antennae are arranged in mirror-image fashion. Each antenna has a first elongate vertical element connected to and extending vertically from one end of a horizontal element. A second, shorter elongate vertical element is disposed proximate an opposite end of the horizontal element and extends upward therefrom in parallel with the first elongate member. First (feed) and second (short) stubby vertical elements are disposed on the horizontal element proximate the second elongate member and extend downward from the horizontal element. A ground plane is formed on the opposite face of the printed circuit board. | 09-12-2013 |
20130300499 | PROGRAMMABLE WIDE-BAND RADIO FREQUENCY FEED NETWORK - The programmable wide-band radio frequency feed network is a wideband multi-port microwave/RF feed network that can operate with multiple communication bands covering a wide frequency range. In addition, the feed network is programmable via a digital controller and has two degrees of freedom, viz., amplitude and phase variations. The feed network provides amplification as well as attenuation to the amplitude of the incoming signals. The feed network is designed using discrete microwave components, and fabricated on a multilayer printed circuit board (PCB) with a small footprint. The digitally controlled feed network is ideal for any antenna array application within the covered frequency range, and can be re-programmed for various wireless communication standards. | 11-14-2013 |
20140218239 | SINGLE-ANTENNA DIRECTION FINDING SYSTEM FOR MULTI-ROTOR PLATFORMS - The single-antenna radio frequency (RF), direction finding (DF) system includes a single-element directional antenna, which is mounted on a multi-rotor UAV (Unmanned Aerial Vehicle) and integrates with a DF algorithm for tracking an RF source in the 2.45 GHz ISM band (or any other frequency band). The algorithm will depend on the rotating nature of the platform to scan the azimuth, as well as several elevation angles with respect to the platform axis of rotation, and thus be able to accurately locate the coordinates of the RF transmitter based on the recorded power levels. The RF source determination step is performed during the search mode of the algorithm. The RF transmitter location is saved, and the UAV takes actions accordingly by commencing movement towards that location in the action mode of the algorithm. After some time, the UAV enters the search mode again in case the RF source has moved. | 08-07-2014 |
20140232572 | CIRCULAR ANTENNA ARRAY FOR VEHICULAR DIRECTION FINDING - The circular antenna array for vehicular direction finding applications is a circular disc having a plurality of microstrip antennas radially spaced around the disc at equal angles. In one embodiment, the circular antenna array includes V-shaped antennas, and in another embodiment, the antennas are Yagi antennas. The circular antenna array can operate under two modes, switched and phased, in the 2.45 GHz band with an operating bandwidth of at least 100 MHz. The circular antenna array is configured to be installed in vehicles. Selective transmittal of an RF signal from a key fob generates a response signal from a specific antenna element receiving the RF signal in line with the direction of origin thereof. An LED panel indicates proximity and direction to the vehicle being located. | 08-21-2014 |
20140266974 | CSRR-LOADED MIMO ANTENNA SYSTEMS - The CSRR-loaded MIMO antenna systems provide highly compact designs for multiple-input-multiple-output (MIMO) antennas for use in wireless mobile devices. Exemplary two element (2×1), and four element (2×2) MIMO antenna systems are disclosed in which complementary split-ring resonators load patch antennas elements. The overall dimensions of the exemplary MIMO antenna system designed for operation from 750 MHz to 6 GHz band remain within 100×50×0.8 mm | 09-18-2014 |
20150070217 | MICROWAVE RADIO DIRECTION FINDING SYSTEM - The microwave radio direction finding system includes two six-port (SP) circuits and 2×2 printed patch antennas, each of the SP circuits having a pair of the patch antennas connected to their inputs, one pair being separated horizontally in a Cartesian plane, the other pair being separated vertically. The output ports are connected to differential amplifiers that produce in-phase and quadrature signals, which are digitized and input to a digital signal processor, which computes the difference in phase for the signals received at each pair of antennas. The processor uses the differences in phase angles to compute both the azimuth and elevation of the received signals, and may do so simultaneously for signals in multiple bands in the microwave region. | 03-12-2015 |