LTCC compatible ferroelectric phase shifters
Artikel i vetenskaplig tidskrift, 2005

Two phase shifters with novel topologies are presented. The phase shifters are based on LTCC compatible ferroelectric films with er=200, and tand=0.04 at 10 GHz. A Ku-band phase shifter is designed to provide DC bias independent matching in the wide frequency range. It has microstrip design where ferroelectric film is used as a substrate and requires relatively low DC bias voltages. The phase shifter showed -15dB matching in 50% bandwidth and 15deg/dB figure of merit. In X-band phase shifter the ferroelectric film is deposited on the low permittivity substrate. Using such two layered substrate a loaded line phase shifter based on coplanar-plate varactors is realized. The varactors are included in the circuit ground and are connected with the microstrip using vias. This designed allows reduction of overall loss due to more efficient use of ferroelectric. The figure of merit of this phase shifter is 20deg/dB at 10 GHz

phase shifters


thick films


Anatoli Deleniv

Chalmers, Mikroteknologi och nanovetenskap (MC2), Mikrovågselektronik

Spartak Gevorgian

Chalmers, Mikroteknologi och nanovetenskap (MC2), Mikrovågselektronik

Heli Jantunnen

Tao Hu

Microwave Symposium Digest, 2005 MTT-S international

01490-645 (ISSN)

Vol. 1 599-602


Annan elektroteknik och elektronik