Zhentian Wu

Chongqing University | CQU · Department of Electrical Engineering Theory and New Technology

An innovative design of an electrically small, unidirectional mixed-multipole antenna (UMMA) compatible with a metal ground that has robust performance characteristics is developed for operation in the 915 MHz ISM-band. It incorporates both a ground-based magnetic near-field resonant parasitic (NFRP) element and a driven composite electric element....

An electrically small, full‐duplex Huygens dipole filtenna (HDF) is realized as a dense array of two HDF elements consisting of Egyptian axe dipole and capacitively‐loaded loop near‐field resonant parasitic (NFRP) elements. The dual‐band HDF elements operate at two very nearby frequency bands and are physically separated by only 0.12 λLB. Benefitti...

This study investigated a compact, uniplanar wideband, differential-fed transparent filtenna. The filtenna incorporated one circular radiator with a ring-slot, two shorting stubs, a defected ground structure, and two coplanar waveguide differential feedlines. These elements were printed on the same side of a section of transparent glass clad with 2...

An omnidirectional, vertically polarized (VP), wideband, electrically small near-field resonant parasitic (NFRP) filtenna is presented. First, a specially-engineered tridimensional inverted-F structure is developed as the driven element to replace the feed copper pin of the shorted top-hat loaded monopole, forming a new NFRP VP antenna with a small...

An electrically small, planar, frequency-agile, beam-switchable Huygens dipole antenna is investigated in this article. The near-field resonant parasitic (NFRP) design incorporates an Egyptian axe dipole (EAD) and a capacitively loaded loop (CLL) that function as the electric and magnetic NFRP elements, respectively. A varactor diode is integrated...

A compact, low-profile, broadside radiating, two-element Huygens dipole array is developed for in-band full-duplex (IBFD) applications. Each radiating element is a multilayer near-field resonant parasitic (NFRP) design that is electrically small with $ka=0.76$ at its resonance frequency, $f_{0} = 1.511$ GHz. The center-to-center distance betwee...

An electrically small, low-profile, Huygens dipole filtenna is presented that operates near 1.28 GHz. The design incorporates a pair of magnetic and electric near-field resonant parasitic (NFRP) elements and a driven element. Two pairs of interdigitated capacitor structures are integrated into the magnetic NFRP element to produce two deep radiation...

A two-port dual-circularly polarized (CP), low-profile broadside-radiating electrically small Huygens dipole antenna is presented that has an advanced feed network and multilayer stacked layout of its electric and magnetic near-field resonant parasitic (NFRP) elements. It radiates left-hand CP (LHCP) or right-hand CP (RHCP) fields at its 1.5 GHz re...

A design of a flexible, uniplanar, vertically polarized, Yagi-configured, electrically small antenna (ESA) that can be conformally mounted on a conducting cylinder with a small radius for endfire radiation is presented. To create a Yagi-configured antenna with both an electrically small size and uniplanar configuration, an interdigital structure is...

A planar double-layer hybrid decoupling structure with the polarization-insensitive characteristics is proposed as an effective isolator for wideband, circularly/dual-polarized, high-density patch arrays. The hybrid decoupling structure is composed of two types of resonators, i.e., an H-shaped structure on the lower layer and a couple of meander li...

An ultralow-profile, electrically small, pattern-reconfigurable metamaterial-inspired Huygens dipole antenna is presented that operates near 1.5 GHz. The design incorporates two pairs of magnetic and electric near-field resonant parasitic (NFRP) elements and a reconfigurable driven element. A pair of p-i-n diodes is integrated into the driven eleme...

Non-Foster technology facilitates the ability to surpass the Chu bandwidth limit associated with electrically small antennas (ESAs). Nonetheless, in addition to challenging stability issues, the enhanced performance can come at the cost of increased noise and resistance losses generated by the active circuit. Consequently, low total efficiency and...

A vertically polarized, low-profile, compact, nearfield resonant parasitic antenna with pattern reconfigurability is demonstrated. The antenna has three dynamic end-fire states facilitated with only three p-i-n diodes. The radiation pattern in each state covers more than 120° in its azimuth plane and, hence, it achieves beam scanning that covers th...

Two electrically small, dual-band Huygens dipole antennas are reported. In both designs, two pairs of magnetic and electric near-field resonant parasitic (NFRP) elements are combined organically within an electrically small, low profile package. The NFRP elements are excited effectively using only one coaxial-fed-driven element. One dual-band Huyge...

An electrically small, low profile, planar, Huygens dipole antenna with four reconfigurable polarization states is presented. The design incorporates both electric and magnetic near-field resonant parasitic elements and a reconfigurable driven element. The four polarization states include two orthogonal linear polarized (LP) and two circular polari...

A dual-linearly polarized, electrically small, low-profile, broadside radiating Huygens dipole antenna is presented, that is, an advanced combination of electric and magnetic near-field resonant parasitic elements. Its prototype was fabricated and tested. The measured results are in good agreement with their simulated values. At 1.515 GHz, the prot...