Accession Number:

AD0838469

Title:

VARACTOR-LOADED LADDER LINES FOR TRAVELLING-WAVE PARAMETRIC AMPLIFIERS AND VOLTAGE-TUNABLE MICROWAVE CIRCUITS.

Descriptive Note:

Final rept.,

Corporate Author:

MICHIGAN UNIV ANN ARBOR ELECTRON PHYSICS LAB

Personal Author(s):

• Tripathi, V. K.

Report Date:

1968-08-01

Pagination or Media Count:

205.0

Abstract:

The purpose of the study is to investigate the properties of a varactor-loaded ladder-line structure for application as a traveling-wave parametric amplifier and voltage-tunable filter, delay line and phase shifter. In order to account for losses, and design appropriate coupling sections, an equivalent-circuit method is developed utilizing the Richards frequency transformation to obtain the properties of coupled ladder-line structures. It is shown that the pass band of the structure, time delay, and phase shift per section can be tuned over a considerable range with proper circuit design. An experimental varactor-loaded ladder-line structure is discussed for X-band. Eight sections have been used to obtain a gain of more than 15 db over an instantaneous bandwidth of 300 MHz. The frequency band can be tuned over 1 GHz by varying the diode capacitance and the pump frequency. Author

Descriptors:

• *PARAMETRIC AMPLIFIERS
• VARACTOR DIODES
• MICROWAVE NETWORKS
• BANDPASS FILTERS
• DELAY LINES
• PHASE SHIFT CIRCUITS
• TUNING DEVICES
• MICROWAVE EQUIPMENT
• X BAND
• THESES

Subject Categories:

• Electrical and Electronic Equipment

Distribution Statement:

APPROVED FOR PUBLIC RELEASE