An overlapping winding coupling path preserves coupling factor in a compact directional coupler while supporting impedance matching and low insertion loss.
Tapered full-height to reduced-height waveguide sections enable wideband power division, non-binary split ratios, and lower return loss.
Separate capacitive traces and a conductive loop let this on-chip directional coupler improve directivity while shrinking circuit area.
Tapered hollow metallic transitions connect RWG to SIW or AFSIW with simpler wideband impedance matching, low loss, and high modal purity.
A slot-coupled conductor layout improves impedance matching while suppressing electromagnetic leakage for more reliable waveguide-microstrip conversion.
A terminated diplexer path absorbs unwanted reflected signals, improving directional coupler extraction accuracy and power measurement.
Waveguide inputs and an integrated cooling loop cut insertion loss, limit back reflection, and prevent overheating in high-power combining.
An output line and open stub lower reflection from impedance mismatch, stabilizing power delivery and phase shift accuracy.