A Ka-Band Electronically Tunable Ferroelectric Filter

This letter presents a three-pole tunable Ka-band coplanar filter that includes six high-Q BST ferroelectric capacitors. It tunes from 29 GHz up to 34 GHz (17%) with low bias voltages ranging from 0 V to 30 V. The filter has fractional bandwidths of 9.5-12.2%. It has a good insertion loss for this c...

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Veröffentlicht in:	IEEE microwave and wireless components letters 2009-06, Vol.19 (6), p.356-358
Hauptverfasser:	Courreges, S., Yuan Li, Zhiyong Zhao, Kwang Choi, Hunt, A., Horst, S., Cressler, J.D., Papapolymerou, J.
Format:	Artikel
Sprache:	eng
Schlagworte:	Applied sciences Band pass filters Bandwidth Barium strontium titanate (BST) Barium strontium titanates Bias Binary search trees Capacitors Circuit properties Dielectric, amorphous and glass solid devices Electric potential Electric, optical and optoelectronic circuits Electronic circuits Electronics Engineering Sciences Exact sciences and technology Ferroelectric materials Ferroelectricity Filter bank Frequency Frequency filters Microwave circuits, microwave integrated circuits, microwave transmission lines, submillimeter wave circuits Microwave filters Microwaves Noise levels Resonator filters Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices Tunable circuits and devices Voltage
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Beschreibung
Zusammenfassung:	This letter presents a three-pole tunable Ka-band coplanar filter that includes six high-Q BST ferroelectric capacitors. It tunes from 29 GHz up to 34 GHz (17%) with low bias voltages ranging from 0 V to 30 V. The filter has fractional bandwidths of 9.5-12.2%. It has a good insertion loss for this category of Ka-band ferroelectric filters, which is between 6.9 dB (0 V) and 2.5 dB (30 V). Two tone measurements showed that the filter has a minimum OIP3 of 15 dBm between 0 V and 30 V. The highest OIP3 value is 26 dBm achieved at a dc bias of 30 V.
ISSN:	1531-1309 2771-957X 1558-1764 2771-9588
DOI:	10.1109/LMWC.2009.2020012