Novel even/odd mode-based CRLH unit cells

Two composite right/left handed (CRLH) unit cells based on conventional microstrip components that support even and odd modes are proposed. The cells consist of a microstrip line loaded, in one cell, by a slotted open-circuited shunt stub, and in the other one, by diagonally-connected coupled lines. The CRLH behavior of these cells is investigated by circuit models and verified by EM simulations and measurements. The measurements show good agreement with theoretical predictions.