Accession Number:

AD1076169

Title:

An Analog Canceller for Improved COTS Circulator Isolation

Descriptive Note:

Conference Paper

Corporate Author:

Qorvo Richardson United States

Personal Author(s):

• Campbell,Charles F.
• Schmid,Paul B.
• Khoja,Jaber A.
• Lovseth,Jon A.

Report Date:

2019-03-25

Pagination or Media Count:

3.0

Abstract:

An analog canceller circuit is added to a commercial off the shelf COTS magnetic circulator. Barium-strontium-Titanate BST tunable capacitors adjust the return loss at the antenna port to reflect signal back into the circulator with the proper amplitude and phase to cancel transmit leakage at the receive port. The circuit increases the isolation by 20-22dB over a 37.5MHz bandwidth with 0.4dB of additional insertion loss. The 950MHz center frequency can be scaled to other frequencies.

Descriptors:

• radio frequency
• signal processing
• insertion loss
• tactical communications
• surface acoustic waves
• barium strontium titanates
• variable capacitors
• cancellation
• CORRELATORS

Subject Categories:

• Electrical and Electronic Equipment
• Radiofrequency Wave Propagation

Distribution Statement:

APPROVED FOR PUBLIC RELEASE