Accession Number:
AD0276454
Title:
UHF FERROELECTRIC PHASE SHIFTER RESEARCH
Descriptive Note:
Corporate Author:
ADVANCED TECHNOLOGY CORP TIMONIUM MD
Personal Author(s):
Report Date:
1962-04-30
Pagination or Media Count:
1.0
Abstract:
The analysis, construction, and performance of compact surface wave ferroelectric phase shifters suitable for operation in the 100 to 1000 mc frequency range are described. Although this ferroelectric loaded parallel plane structure is a very low impedance structure, a satisfactory terminal impedance matching technique has been devised, Kilovolt level voltages are needed but since the current required to maintain or rapidly shift phase is low, the over-all control power requirements are at least an order of magnitude less than those for comparable ferrite phase shifters. One of these room temperature operable phase shifters provided 348 degrees of phase shift and had an insertion loss which varied from 3.7 to 2.2 db at 207 mc and over a zero to 4000 volt range of applied dc control voltage. Author
Descriptors:
- *FERROELECTRIC MATERIALS
- *PHASE SHIFT CIRCUITS
- ATTENUATION
- CAPACITORS
- CERAMIC MATERIALS
- CHEMICAL MILLING
- ELECTRIC FIELDS
- ELECTRODES
- GOLD
- IMPEDANCE BRIDGES
- IMPEDANCE MATCHING
- MACHINING
- MAGNETIC FIELDS
- MEASUREMENT
- MICROWAVES
- PREPARATION
- PROPAGATION
- RADIOFREQUENCY
- RADIOFREQUENCY POWER
- SILVER
- STANDING WAVE RATIOS
- TEMPERATURE
- THEORY
- TRANSFORMERS
- TRANSMISSION LINES
- ULTRAHIGH FREQUENCY
- WAVEGUIDES