Breast cancer is a frightening type of cancer for women globally, including in Indonesia. Early detection of cancer symptoms is crucial to reducing mortality rates. Microwave imaging systems using the ultra-wideband (UWB) can detect objects, particularly in medical diagnosis. The textile antenna is the latest development in antenna technology that can be used on the human body. This antenna can be bent and adjusted to the body's complex shape. This research proposed a textile antenna using the felt dielectric substrate material operating at 3.8 GHz. The simulation results showed a return loss value of -47.5138 dB and a bandwidth of 1.4 GHz. The antenna was also tested on a breast phantom with a tumour scenario, showing higher amplitude in the quadrant with the tumour. The fabrication was done manually through laser cutting and heat-assisted bonding. The antenna made of the felt substrate material could detect breast tumours’ multiple depths or layers using the graphical user interface (GUI) programming.

Indonesia had a total of 19.47 million individuals diagnosed with diabetes in 2021, the fifth position globally, as reported by the International Diabetes Federation (IDF). Diabetes requires periodic medical examinations, yet many individuals are hesitant to utilize invasive medical devices. The ring slot circular resonator (RSCR) inspired this sensor’s design. Non-invasive glucose measurement was done with flexible 2.45 GHz sensors. The reflection coefficient (S11) simulation result is -20.76 dB at 2.458 GHz and 894.8 MHz bandwidth. Saliva samples obtained from 20 individuals were subjected to 20 separate tests. Before collecting saliva samples, the volunteers’ blood sugar levels were assessed. Research indicates that the appropriate frequency range for average blood sugar levels (less than 125 mg/dl) is 1.55 GHz to 2.16 GHz, while diabetes patients with blood glucose levels (BGL) above 125 mg/dl had frequencies above 2.3 GHz. Test results show a positive correlation between glucose level and testing frequency. In addition to blood samples, saliva samples can serve as alternate specimens for assessing an individual’s BGL.

This paper describes the development of radar object detection using two dimensional constant false alarm rate (2D-CFAR). Objective of this development is to minimize noise detection if compared with the previous algorithm that uses one dimensional constant false alarm rate (1D-CFAR) algorithm such as order-statistic (OS) CFAR, cell-averaging (CA) CFAR, AND logic (AND) CFAR and variability index (VI) CFAR where has been implemented on coastal surveillance radar. The optimum detection result in coastal surveillance radar testing when Pfa set to 1e-2, K^th set to 3/4*Nwindow and Guard Cell set to 0. Principle of 2D-CFAR algorithm is combining of two CFAR algorithms for each array data of azimuth and range. Order statistic (OS) CFAR algoritm is implemented on this 2D-CFAR by fusion rule of AND logic.The algorithm of 2D-CFAR is developed using Microsoft Visual C++ 2008 and the output of 2D-CFAR is plotted on PPI scope radar using GDI+ library. The result of 2D-CFAR development shows that 2D-CFAR can minimize noise detected if compared with 1D-CFAR with the same parameter of CFAR. Best performance of 2D-CFAR in object detection when Nwindow set to 128. The time of software processing of 2D-CFAR is about two times longer than the 1D-CFAR.

A microwave planar filter using multi-poled Hairpin resonators in a Roger substrate is proposed for narrow-band operation in S-band applications. The proposed filter is composed of several pole resonators with Hairpin structures and designed with planar structures on a Roger substrate. 100 MHz bandwidth in 3 GHz operational frequency is designed for the proposed filter. Calculation methods using simulation software and results of the characteristics are discussed and reported. The proposed device is analyzed using Advanced Design System (ADS) software where the substrate with dielectric constant of 3.48 and thickness of 1.524 mm is used. The designed device has a simple and compact structure, easy in design and fabrication, and compatible with integrated microwave circuit.

In this paper, microstrip structure is developed to realized a. Bandpass filter at 3 GHz of the center frequency with 200 MHz bandwidth. The filter based on the hairpin method with used square groove technique at the resonators. It has compact in the size and also have good responses for insertion loss, return loss and bandwidth. The design methodology is present with design, fabrication and measurement the prototype used VNA. The filter designed for simulation and realization with substrate Roger 4350B with permittivity 3.48, loss tangent 0.0038, and thickness 1.524 mm using five poles resonators. The simulation and optimization is done using ADS 2011. Responses Insertion Loss at 3 GHz -0.7 dB and the Return Loss at -29.9 dB.