An X-band magnetic dipole quasi-Yagi antenna based on a dielectric resonator

Abstract

A magnetic dipole quasi-Yagi antenna based on a dielectric resonator (DR) is proposed in this letter. The dominate TE1δ1 mode of the rectangular DR is used as a magnetic dipole which can be differentially fed by the coplanar strip line (CPS). Thanks to the DR employment, the proposed antenna has several advantages such as compact size and flexible design which means the 3-D dimensions of the DR can be easily adjusted to cater for various applications. Meanwhile, the gain of the proposed DR quasi-Yagi antenna is higher than that of traditional electric dipole counterparts. Furthermore, since the DR driver is horizontally polarized, both the metal strip and DR can be used as a director for enhancing the end-fire gain. To verify the design concept, a prototype operating at the X-band is fabricated and measured. Good agreement between the simulated and measured results can be observed.

An X-band gain-enhanced bidirectional antenna array using strip-loaded dielectric resonator operating in TE3δ1 mode

“…3(a), the TE 3δ1 mode has three E-field circles tangential to the x-z plane, Table 1. Performance comparison with the previous antenna element in [18]. and it is undesirable that the E-field direction along the right-side wall (x-axis direction) of the middle circle is opposite to those of its both sides.…”

“…Table 1 gives the performance comparison of the proposed antenna using the higher-order TE 3δ1 mode (without loading strip here) with the previous quasi-Yagi antenna element in [18]. The antenna gain is about 2.46 dBi higher than that of the design in [18]. According to the TE 3δ1 mode E-field distribution in Fig.…”

“…In this design, the rectangular DR operating at higher-order TE 3δ1 mode is used as a magneticdipole driver, which implies higher gain can be achieved. Table 1 gives the performance comparison of the proposed antenna using the higher-order TE 3δ1 mode (without loading strip here) with the previous quasi-Yagi antenna element in [18]. The antenna gain is about 2.46 dBi higher than that of the design in [18].…”

“…Quasi-Yagi antenna element Figure 2 illustrates the configuration of the proposed quasi-Yagi antenna element, which is composed of a rectangular DR partially printed with a metal strip, one layer of the substrate, a transition of differential microstrip line pair to groundless balanced coplanar strip line (CPS) for differential excitation of the DR, and ground plane (used as a reflector) on the bottom of the substrate. The quasi-Yagi antenna element based on the dominate TE 1δ1 mode DR is proposed in [18] and the antenna gain can be improved as compared with the traditional quasi-Yagi antenna using metal strips. However, the gain improvement is still limited and can be further enhanced.…”

Design of Dual-/Wide-Band Quasi-Yagi Antenna Based on a Dielectric Resonator

“…It is well known that dielectric resonator (DR) has several advantages, such as high radiation efficiency and flexible design, and then is extensively applied in wireless communication systems [28]- [31]. In [32], a quasi-Yagi antenna based on a DR is reported, which has higher gain over traditional metal quasi-Yagi antenna. However, it has a narrow FBW of 3% because only one TE 1δ1 mode is used.…”