Accession Number : ADA306512

Title :   Field Emitter Array RF Amplifier Development Project. Phase 1. Option 1.

Descriptive Note : Quarterly rept. no. 9, 16 Oct 93-15 Jan 94,

Corporate Author : MICROELECTRONICS CENTER OF NORTH CAROLINA RESEARCH TRIANGLE PARK ELECTRONIC T ECHNOLOGIES DIV

Personal Author(s) : McGuire, Gary ; Devereux, W.

PDF Url : ADA306512

Report Date : FEB 1994

Pagination or Media Count : 33

Abstract : Modulation of anode current at 1 GHz was observed on two different devices. The devices tested were 1,197-tip arrays of 4 micrometer column emitters. Net signal gain of 0.84 dB was recorded at a bias current of 172 micro-A. As more devices are tested, it is expected that increased RF gain will be observed. An identical array was tested at lower frequencies (1 - 50 MHz). Extrapolating from the gain measured in this frequency range shows reasonable agreement with high frequency measurements. The data also reinforces the calculated value of fT for devices produced at MCNC. A 232,630-tip array operated for 18 hours with anode current between 1 and 2 mA at a gate potential of < 150 V. Devices with low work function and metal coatings were electrically tested. The first fabrication run of 4 micrometer column devices is complete. Arrays of up to 232,630 tips have been successfully fabricated, electrically tested, and have produced significant anode current. The second fabrication run of 4 micrometer column devices is proceeding on schedule. The lot origination process for the 6 micrometer column devices is complete, and the devices are now in processing.

Descriptors :   *EMITTERS, *RADIOFREQUENCY AMPLIFIERS, GATES(CIRCUITS), METAL COATINGS, GAIN, WORK FUNCTIONS, BIAS, RADIO SIGNALS, ULTRAHIGH FREQUENCY, COLD CATHODE TUBES, ANODES(ELECTRON TUBES), FIELD EMISSION TUBES.

Subject Categories : Electrical and Electronic Equipment
      Radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE