Compact E-band planar quasi-Yagi antenna with folded dipole driver

Adaptive Antenna Arrays for Ad-Hoc Millimetre-Wave Wireless Communications

“…The driver on the top plane simultaneously directs the antenna propagation toward the endfire direction, and acts as an impedance-matching parasitic element. The driver element may also be implemented using a folded dipole to give greater flexibility in the design of the driver impedance value and to enable use on a liquid crystal polymer substrate (Nikolic et al, 2009;Nikolic et al, 2010). For this application, the quasi-Yagi antenna is fabricated on an Alumina substrate with following specifications: dielectric thickness 127µm, metallization thickness 3µm, dielectric permittivity r =9.9 and loss tangent, tan = 0.0003.…”

Wideband Quasi-Yagi Antenna Design and Its Usage in Mimo/Diversity Applications

“…With the rapid development of wireless communication systems, there are urgent demands for wideband quasi-Yagi antennas. Various technologies have been developed to broaden the bandwidth of quasi-Yagi antennas [1][2][3][4][5][6][7][8][9]. Coplanar waveguide (CPW)-to-slotline transitions [1,2] are convenient to be used to improve the bandwidth of quasi-Yagi antennas.…”

“…On the other hand, much attention have been drawn to avoid the bottleneck brought by the drivers. The bandwidth of quasi-Yagi antennas could be broadened by using folded dipole drivers [5,6], tapered driver [7] or bowtie driver [8]. In addition, wideband quasi-Yagi antenna also could be achieved with the dual-resonant driver [9], though the use of capacitors and inductors could bring additional loss of energy.…”

Planar Double-Sided Printed Quasi-Yagi Antenna With Enhanced Impedance Bandwidth and Reduced Size for Wideband Wireless Applications

“…Since the driver element of a planar quasi-Yagi antenna is a balanced structure, whereas the feeder is usually an unbalanced coaxial cable, to broaden the impedance bandwidth of the antenna, various techniques in [1][2][3][4][5][6][7][8][9] focus on the balanced-to-unbalanced (balun) transition structures, including coplanar waveguide (CPW)-to-slotline transition balun [1,2], microstrip-to-coplanar stripline (CPS) transition balun [3][4][5], microstrip-toslotline transition balun [6][7][8] and a novel integrated balun with stepped impedance coupled structure [9]. Many newly published references, such as [6][7][8], are inclined to employ microstrip-to-slotline transition balun structures to obtain stable radiation pattern and gain within a large bandwidth.…”