A Broad Band Patch Antenna Used as Auxiliary Load for Measuring Multi-port Device with 2-port VNA at W-band

Author(s)

Wang, Dongwei ; Jakoby, Rolf ; Maune, Holger ; Ferrari, Philippe ; Serrano, Ariana L. C. ; Rehder, Gustavo P. ; IEEE

• Document type: Journal article
• Source: PROCEEDINGS OF THE 2022 14TH GERMAN MICROWAVE CONFERENCE (GEMIC); v. N/A, p. 4-pg., 2022-01-01.

Abstract

This paper presents a simple technique for characterizing multi-port devices. It gives a fast and efficient measurement of the scattering S-parameters of the multi-port device under test (DUT) by measuring 2 of the N ports while other N-2 ports being terminated by broad band antennas as substitution to 50 Omega loads to minimize reflection. This method is applied to the characterization of a 4-port branch-line quadrature hybrid coupler centered at 100 GHz, where direct 4-port measurement are not equipped. Widely available post processing algorithms are then applied which reconstruct the C-2(N) sets of 2-port measured S-parameters into a N port S-parameter for testing purpose. The reconstructed S-parameters match the 4-port simulation well especially in terms of amplitude and phase of the transmissions at both output ports. (AU)

• FAPESP's process: 16/25779-9 - Multi-User Equipment aproved in grant 2012/15159-2: Vector Network Analyser (VNA) up to 70 GHz
• Grantee: Ariana Maria da Conceicao Lacorte Caniato Serrano
• Support Opportunities: Multi-user Equipment Program