Ke Chen

Bio: Ke Chen is an academic researcher from University of Electronic Science and Technology of China. The author has contributed to research in topics: Microstrip & Wilkinson power divider. The author has an hindex of 1, co-authored 1 publications receiving 10 citations.

A novel W-band ultra-wideband substrate integrated waveguide (SIW) T-junction power divider

Abstract: A novel w-band ultra-wideband SIW power divider is presented. This ultra-wideband power divider utilizes substrate integrated waveguide (SIW) such that the overall size is largely reduced by half. SIW belongs to a sort of closed power splitter structure can effectively evade cavity resonance problem caused by W-band power divider. The power divider uses traditional T-junction Wilkinson structure. A novel method by setting the appropriate cut-off frequency, either complete the W-band power distribution, but also isolate the low harmonics (60GHz in this design) at the same time. A very broad bandwidth from 80GHz up to 100GHz is obtained. In the meanwhile, output return loss is better than -15dB by EM simulation.

Broadband substrate-integrated waveguide T-junction with arbitrary power-dividing ratio

Abstract: A novel broadband substrate-integrated waveguide (SIW) T-junction with an arbitrary power-dividing ratio is proposed. Three inductive posts are designed to adopt flexibility for the equal output T-junction to obtain a wide impedance bandwidth. To realise the unequal power-dividing ratio over a wide bandwidth, the SIW coupler is integrated with corner structures and a novel T-junction structure is formed. Three T-junctions with different power division ratios (1:1, 1:4 and 1:8) at a centre frequency of 6 GHz are simulated, fabricated and measured. The measured bandwidths are 60, 53 and 63.3%, respectively.

Design of High Gain Planar Dipole Array Antenna for WLAN Application

Abstract: This paper presents a new design of planar dipole array antenna (PDAA). Radiated patches are etched on the metallic layer of a double-sided printed circuit board (FR4) to form the PDAA. The two symmetric flags with trapezoid patch are designed on both side of the print circuit board to form the basic dipole element. IE3D software is used to design PDAA. Better parameters are selected to manufacture the proposed array antenna. The fabricated 4×8-element planar dipole array antenna can be operated at 5.2/5.8 GHz successfully. With suitable size parameters of the dipole element, PDAA is fabricated. From the measured results, the wide bandwidth about 1.97GHz is obtained. The peak gain of the fabricated PDAA with reflector is 15.55dBi at 5.2GHz and 17.53dBi at 5.8GHz. This high gain planar dipole array antenna can be used in WLAN frequency band.

A W -Band 1-dB Insertion Loss Wilkinson Power Divider Using Silicon-Based Integrated Passive Device

Abstract: This work presents an on-chip Wilkinson power divider using silicon-based integrated passive device (IPD) technology that operates from 70 to 110 GHz, thereby covering the entire $W$ -band (75–110 GHz). Based on a simple impedance transformation different from the conventional Wilkinson power divider topology, the proposed silicon IPD power divider with a core size of 0.417 mm2 can demonstrate power loss of less than 1.1 dB along with input–output return loss better than 14 dB throughout the entire band.

Terahertz Power Divider Using Symmetric CPS Transmission Line on a Thin Membrane

Abstract: Recently, research has focused on developing efficient wave-guided THz system-on-chip (TSoC) components to reduce physical bulk, loss and cost of free-space THz systems. We recently demonstrated a TSoC platform using a coplanar-stripline (CPS) transmission-line on a $1~\mu \text{m}$ -thin membrane to generate and detect THz-bandwidth pulses with low loss and low dispersion up to 1.5 THz. In this paper, we demonstrate experimentally an in-phase THz power divider (TPD) at frequency 0.65 THz using the CPS transmission line defined by photolithography on a thin membrane. Measured pulses show close agreement with simulation results. The spectral power density of the measured THz-bandwidth pulses at the output ports are identical at the frequency of 0.65 THz with less than 1 dB power imbalance over a wide spectrum up to 1 THz.

Compact out-of-Phase Wideband Substrate Integrated Waveguide based Power Divider Loaded by Slots for Ku and K Band Applications

Abstract: In this paper a novel Substrate Integrated Waveguide (SIW) based single layer ground-loaded compact wideband out-of phase equal power divider is proposed . The wide-band and out-of-phase operation of the proposed power divider is obtained by creating defects in the ground plane with rectangular slots. The Defected Ground Structure (DGS) allows the power divider to exhibit a wide passband. The obtained passband is 11.5 GHz wide considering the return loss better than -10dB. Compactness in the proposed design is attributed to the dispersion characteristic of the slow-wave. The proposed design working in the passband from 14.5 GHz to 26 GHz is fabricated and tested. The size of the proposed design is 0.57 λ2 g excluding feed lines. Here λg is the guided wavelength at free space. The measured amplitude imbalance of (0±1) dB is obtained within the passband. The measured and simulated results are compared and found with in good agreement.