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In spread spectrum communication systems, it is required to use the spread sequences that have good correlation properties. Complete complementary code is a set of spread sequences, and has ideal auto- and cross-correlation properties. Some previous works have shown that it can be applied into wireless communication systems like approximately synchronized CDMA systems. The authors have proposed a...
This paper proposes a super-compact wideband balun configured by a combination of a multi-layered (ML) composite right/left-handed (CRLH) transmission line (TL) and a conventional right-handed meander line. Quasi left-handed property of the ML CRLH TL is fully utilized for the phase design, leading to significant size reduction of the balun. The balun, with dimensions of 7.5 ?? 5.0 ?? 1.8 mm3, has...
Digital watermarking technologies with spread spectrum (SS) sequences have been previously proposed. The sequences used in previous studies, however, do not necessarily have good correlation properties. It is known that complete complementary codes have ideal correlation properties and very effective for mobile communication systems like CDMA. In this paper, it is shown that correlation properties...
This paper studies multi-layered composite right-/left-handed transmission lines (ML CRLH TL). To realize wideband response from left-handed passband to right-hand passband without band gaps and other undesired parasitic resonances, a balanced ML CRLH TL with defected parallel plates is newly proposed and demonstrated theoretically by using FEM-based EM simulator. A wide passband from 2.0 GHz to 9...
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