An improved element for use in array antennas

Wideband linear and dual-polarized antenna based on Huygens' source principle

“…The concept of a complementary antenna, which is based on Huygens' source principal, is implemented by exciting an electric dipole and a magnetic dipole simultaneously, so as to have equal E-and H-planes radiation patterns as proposed by Clavin in 1954 [1]. It is well known that the radiation pattern for the electric dipole has a figure-8 shaped pattern in the E-plane and a figure-O shaped pattern in the H-plane; whereas the radiation pattern for the magnetic dipole has a figure-O shape in the E-plane and a figure-8 shape in the H-plane.…”

“…This idea was realized by Clavin again in 1974 [2]. Similar designs using a slot and dipole combination [3][4][5][6] are suggested, however, all of these designs [1][2][3][4][5][6] are either narrow bandwidth or bulky in structure. Recently, a wideband complementary antenna was proposed by Wong and Luk [7][8].…”

Investigation on complementary antenna based on bow-tie shaped meander slot

“…By using the concept of complementary antenna [4][5], several wideband antennas composed of magnetic dipole and electric dipole are proposed [6][7][8]. Although both loop and slot antennas can be equivalent to magnetic dipole, some constraint conditions should be met for them as combined with electric dipole to get high FBR radiation pattern on account of their electric fields in the far-field are different.…”

A novel low-profile slot antenna with unidirectional radiation

“…In recent years, prof. Luk et al have proposed, based on the concept of complementary electric dipole and magnetic dipole [10], [11], a series of novel antennas with improved characteristics such as wide band (or even UWB) and symmetric radiation pattern in the E-and H-planes [12]- [14]. Inspired by this, we have recently proposed an idea for constructing a unidirectional slot radiator with its complementary dipole etched on the opposite single-layer PCB board [15].…”