The LLWG: A Novel Low-loss, Low-cost, Small-diameter THz Waveguide For Compact, Light-weight mmw and THz Applications
- The most significant advance in waveguides for the 70-1500 GHz range in half a century
- Loss typically over 100X to 100,000,000 below that of classic rectangular waveguides in the 150 GHz to 1500 GHz range depending on the frequency. The benefit goes up as the frequency goes up.
- Half-octave bandwidth for -0.5 dB. Negligible dispersion.
- A broad line of tapered transitions, miter bends, and straight waveguides is under development, with standard round flanges (UG-383/U or UG-387/U) for all bands in the 150-1500 GHz range, in six sizes: 6.35 mm, 7.94 mm, 9.53 mm, 12.7 mm, and 15.9 mm OD.
- Applications include: Ultra-broadband 6G and 7G Wi-Fi, THz Imaging, NMR-MAS-DNP, THz Time-domain Spectroscopy, Satellite Millimeter-wave (mmw) systems, photonics, ADAS (Advanced Driver Assistance Systems), and your unique project.
- Loss comparable to that of small, corrugated waveguides, but lighter and cheaper.
- Supports HE11 and TE11, couples efficiently to TEM00, and suppresses parasitics.
- Negligible currents in the flanges (interfaces) with HE11, which eliminates the critical alignment, contact, and dimensional requirements that have plagued conventional mmw/THz systems.
- HE11 launchers in development for converting directly from rectangular TE10 to overmoded HE11.
- Loss is inversely quadratic with diameter. Generally, choose the largest diameter that works within your space or mass constraints.
- Licensing opportunities available.
Much more detailed information in the international patent. F David Doty.
