Adi Pandu Wirawan

Bio: Adi Pandu Wirawan is an academic researcher from Sepuluh Nopember Institute of Technology. The author has contributed to research in topics: Wilkinson power divider & Return loss. The author has an hindex of 1, co-authored 1 publications receiving 7 citations.

Design of substrate integrated waveguide based power divider for S-band applications

Abstract: In this paper, a SI W based power divider for S-band applications is proposed The proposed power divider is designed using Y-junction configuration on Rogers R04360 substrate with dielectric constant of 615 and substrate thickness of 152 mm The high dielectric constant substrate is selected for the sake of minimizing the dimension of power divider The proposed power divider is numerically analyzed in terms of return loss and output power equality Besides that, various characteristic of power divider is also investigated as an effect of different vias diameter of SIW and different types of transition structure Based on the numerical analysis, the proposed SIW based power divider demonstrates a good performance over the frequency range of 2–36 GHz with return loss less than −15 dB in the 2–24 and 27–36 GHz band The output power equality achieves 34 ± 02 dB approximately

Substrate-Integrated-Waveguide Power Dividers: An Overview of the Current Technology

Abstract: Power dividers are important components of microwave/millimeter wave (mm-wave) circuit design. This article provides a comprehensive review of the state-of-the-art substrate-integrated-waveguide (SIW) power dividers/combiners. SIW technology converts waveguide-like structures into planar form, compensates for the drawbacks of microstrip structures at higher-frequency circuit designs, and minimizes production complexity and costs compared to conventional waveguide structures. An overview of how traditional dividers have progressive adopted the SIW technique is presented and a comparative performance analysis of the divider types and practical paradigm show the future potential of SIW technology.

SIW planar balun with enlarged bandwidth

Abstract: An X-band substrate integrated waveguide (SIW) balun, based on a Y-type divider with enlarged bandwidth, is presented in this study. In most SIW Y-type dividers, the undesired TE 30 mode either leads to the deterioration of the in-band reflection or constrains the bandwidth by a transmission zero. The cause of the transmission zero is analysed and the modes coupling, rather than the step impedance matching, is utilised to reduce its impact. In the traditional Y-type divider, the frequency band is split by this transmission zero, while in the proposed wideband configuration, the co-existences of the TE 10 and TE 30 modes are employed to combine the two non-contiguous bands. A broadband balun is designed and fabricated, with the improved Y-type wideband divider serving for the power-dividing part. The dividing ports are connected to the reversely placed transitions, achieving inherent out-of-phase performance and good amplitude property. The measurement of the balun suggests a 43.94% bandwidth from 8.23 to 12.89GHz, with 15dB return loss. The measured amplitude and phase imbalance between two output ports are below 0.7dB and ±3°, respectively. The performance of the fabricated balun is in agreement with the simulation, and it is promising for wideband applications.

Broadband Y-type Divider in Ku-band Using Substrate Integrated Waveguide

Abstract: This paper presents the study and analyses on substrate integrated waveguide (SIW) Y-type power dividers. In traditional configurations, a potential stop peak exists and separates the dominant frequency band. To overcome this drawback, a Y-type power divider with an enhanced bandwidth is proposed, where the reflection at the stop peak is reduced. The broadband characteristic relies on the adjustment of the TE 10 and TE 30 modes in the coupling region. The symmetric topology could ensure balanced phase and amplitude properties at two output ports. For the demonstration, the prototype is fabricated by the printed circuit board (PCB) process. Measurements agree well with simulations, and a fractional bandwidth of 50.26% around the centre frequency of 15 GHz is measured with 10 dB return loss.

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.

Numerical characterization of a SIW-based time delay line element with meandered slots structure

Abstract: This paper presents a delay line element with meandered slots being part of a substrate integrated waveguide (SIW) structure and its numerical analysis. The proposed delay line element is designed by using a coplanar waveguide (CPW) configuration due its low dispersion compared to other transition configurations. The proposed delay line element is designed on a substrate of Rogers RO4360 with a thickness of 1.524 mm. Its numerical characterization is conducted in terms of return loss, insertion loss and group delay time. By numerical analysis and synthesis, the optimum delay line element can be designed and the desired characteristics can be achieved for operation in the frequency range of 1.4–2.8 GHz with a return loss up to 40 dB at a frequency around 1.75 GHz. Additionally, an almost flat insertion loss with values around 0.5 dB and a likewise nearly constant time delay around 1 ns is achieved over the desired frequency band.