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Project Gallery < RF and electronics design, engineering, and consulting services at Apex Wireless

Project Gallery

Avalanche Rescue Beacon

This avalanche rescue beacon is optimized to facilitate fast rescue of one or more buried victims. Employing multiple ferrite antennas, accurate vectoring to victim location is possible with minimum search time. It operates on the international standard 457 KHz search and rescue frequency. Customer: Backcountry Access

“Falcon” Telemetry Transmitter

We designed this fully synthesized UHF telemetry transmitter for wildlife tracking. It is used primarily on small predatory birds such as falcons. Ultra stable frequency can be programmed though a non-contact wireless link. These tiny transmitters achieve a range of over 20 miles when used with a directional tracking receiver. Customer: Marshall Radio Telemetry

High Power Bluetooth Module

We integrated a high power amplifier and low noise receiver at 2.4 GHz to improve the range of this Bluetooth module. With output power at the FCC limit of 1W, the module size was kept small for easy integration onto the customer’s PCB. (Fortune 500 customer wishes to remain anonymous)

PC Card Transceiver

This is a PC Card format transceiver used primarily for automated meter reading in the 900 MHz spread spectrum band. Using proprietary DSP technology, it can read hundreds of meter transmitters simultaneously and is also capable of reading three different metering formats. It incorporates a high power “wake up” transmitter. (Fortune 500 customer wishes to remain anonymous)

RFID Reader

This RFID reader prototype was designed to operate in the 902–928 MHz ISM band as well as the 868 MHz European band in compliance with the EPCglobal standard. It employs an ultra low phase noise homodyne transceiver to achieve read range in excess of 7m. (Fortune 500 customer wishes to remain anonymous)

Satellite Transmitter

This is a one-way Earth to satellite transmitter designed for low cost remote data collection and transmission. It puts out 1W of power at 2.4 GHz and employs direct sequence spread spectrum (DSSS) modulation using Gold codes. (Fortune 500 customer wishes to remain anonymous)

Spread Spectrum PC Card

This PC Card format spread spectrum transceiver includes an embedded antenna. It is designed to test and troubleshoot automated meter reading transmitter installations. (Fortune 500 customer wishes to remain anonymous)

Spread Spectrum Transceiver

This is a full featured spread spectrum transceiver operating at 902–928 MHz. This design has been licensed for use in multiple applications including remote credit card verification, advance flood warning and resource management data collection.

Telemetry Transmitter

This is a one-way transmitter designed to send real-time flight telemetry data from a model aircraft or UAV to its operator. It employs frequency hopping spread spectrum (FHSS) technology in the 902–928 MHz ISM band. As a cost sensitive hobby product, it was optimized for inexpensive offshore manufacturing with no tuning or adjustment required. Customer: Eagle Tree Systems

RFIC Test Jig

This jig facilitates testing the IC voltage output of passive RFID tags as a function of input power and matching.