A Miniaturized Delay Line based on Slow-Wave Substrates

Abstract

We propose miniaturized delay lines on layered synthetic substrate materials which support slow-electromagnetic propagation. Under certain conditions such substrates mimic materials with ultra-high electric permittivity. The proposed structure is easily fabricated and a miniaturization factor of two orders of magnitude is reported. Theoretical and experimental results are in good agreement.

Plačiajuosčių planariųjų lėtinimo sistemų modeliai ir jų tyrimas

“…VL matmenis gali būti sumažinti ir kitu būdu -užpildant jos skerspjūvį medžiagomis su didelėmis dielektrinėmis ir magnetinėmis skvarbo-mis. Tokiu būdu darbe (Prodromakis et al 2007) nagrinėjama VL išdėstyta ant sluoksniuoto sintetinio pagrindo, kurio santykinė efektyvioji dielektrine skvarba ɛ r eff ≈ 2900.…”

Micro-scale lowpass filters based on the Maxwell-Wagner phenomenon

“…In other words, under certain parameters, these multilayer structures behave as a single layer that exhibits an excessive dielectric constant. Numerous devices utilizing this kind of "slow-wave propagation", for attaining smaller physical dimensions, have been reported; such as the semiconductor travelling-wave amplifier (STWA) [7], miniaturized microstrip antennas [8] as well as true delay lines [9]. To the best of our knowledge, the idea of utilizing "slowwave" substrates for developing distributed filters has been first reported in [10] by the authors of this communication.…”