Abstract
This paper implements wideband, low-loss, and via-free left-handed transmission lines (LH-TLs) using superconductor thin films. Introducing superconductors greatly reduces the loss inherited in the constituent series capacitors and shunt inductors of such planar LH-TLs. The measured results agree very well with design expectations. The bandwidth of left-handed characteristics is 4.9-10.9 GHz, with a minimum insertion loss of 0.03 dB at 30 K. Open-ended LH-TL resonators are also characterized at the different harmonics; of special interest are those with zero or negative phase constants, which are not possible when using any conventional transmission lines. Temperature-dependence measurements of the LH-TLs reveal the effect of the superconductor kinetic inductance.
| Original language | English |
|---|---|
| Pages (from-to) | 1893-1897 |
| Number of pages | 5 |
| Journal | IEEE Transactions on Applied Superconductivity |
| Volume | 16 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 1 Sept 2006 |
Keywords
- resonators
- coplanar waveguides (CPWs)
- left-handed transmission lines (LH-TL)
- superconducting microwave devices