02039nas a2200169   4500008004100000245008800041210006900129260000900198300001400207490000600221520144000227653002301667653002201690653002601712100001401738856011701752       2011                        eng d00aScanning-beam antenna on metamaterials coplanar structure for wireless applications0 aScanningbeam antenna on metamaterials coplanar structure for wir  c2011  a111 - 1160 v93 aA scanning-beam antenna on metamaterial coplanar structures is presented. The proposed antenna is, in essence, a composite of Right/Left-Handed (CRLH) coplanar waveguide (CPW) structure incorporating distributed periodic structures with L-C high-pass filter topology which support left-handed (LH) waves. The negative refractive index (NRI) properties of these structures are shown theoretically, numerically and validated by full-wave simulations. The supported LH wave is fully characterized and based on the composite right/left-handed transmission-line (CRLH-TL) theory; and the dispersion characteristics, refractive indexes and Bloch impedance are derived theoretically. In addition, formulas to extract equivalent-circuit parameters from full-wave simulation are given. Since the distance d between adjacent cells of the array is small, d &lt; &lt; λo and the array becomes a uniform leaky-wave antenna (LWA) for a 10-cell operating near 10 GHz. Simulated radiation pattern, gain, and associated loss budget are presented. The results of LWA exhibit scanning-beam capability from backfire-to-endfire direction and accord well with the theoretical analysis. The antenna is printed on thin and flexible substrate (h = 25 μm). Furthermore, since the antenna is implemented with low-cost and CPW technology, it is a good candidate for integrated RF/microwave systems that can be used in digital wireless communications and radars.10aCoplanar Structure10aMicrowave systems10aScanning-Beam Antenna1 aHamdi, A.  uhttp://www.scopus.com/inward/record.url?eid=2-s2.0-80053027377&partnerID=40&md5=64150e3e06edecef1c364f45804780d2