Reliability and Stability of Novel Tunable Thin Film

Abstract

A new process has been developed in Paratek Microwave Inc. to formulate stable tunable (Ba, Sr)TiO3 (BST) based thin film material. Varactors, with a co-planar structure, were fabricated by using the new material. The varactor Q of 105 tested at 2 GHz was observed with average tunability of 58 % at 150V (37.5 V/micrometer). The lifetime tests indicated that this material is very stable under continuous 100 to 150 V dc bias both at the room temperature and in 70 deg C environment. Thus, this novel tunable thin film material opens a new avenue to develop high quality tunable microwave devices. Tunable IF filters have been built by using this novel material for microwave backhaul radios and handset applications. Initial results of a RF phase shifter are also included and demonstrate another application of these films.

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Document Details

Document Type
Technical Report
Publication Date
Apr 03, 2003
Accession Number
ADP013343

Entities

People

  • G. H. Lin
  • Jiande Sun
  • R. Fu
  • S. He
  • Xiaoxuan Zhang

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Crystal Structure
  • Electrodes
  • Figure Of Merit
  • Films
  • Frequency
  • Insertion Loss
  • Losses
  • Low Temperature
  • Mass Production
  • Materials
  • Measurement
  • Microwaves
  • Planar Structures
  • Radio Frequency Devices
  • Technical Information Centers
  • Thin Films
  • Voltage Controlled Oscillators

Readers

  • Electronics Engineering
  • Materials Science and Engineering.
  • Quantum Dot Semiconductor Device Photonics and Graphene Optoelectronic Materials and THz Physics.