Microwave imaging is an emerging diagnostic technique that
uses electromagnetic fields in the microwave frequency
range to extract clinically relevant information, while
relying on safe and cost-effective instrumentation. A key
challenge is the extraction of useful signals from
measurements, due to the intrinsic complexity of
wave–matter interactions. To address this limitation and
improve the sensitivity and specificity of microwave
imaging for diagnosing and monitoring pathological
conditions, magnetic nanoparticles have been proposed as
contrast agents. These nanocomposites are particularly
suitable because they can induce variations in the magnetic
properties of otherwise non-magnetic media. In addition,
their microwave response can be remotely controlled by
applying a low-frequency magnetic field of appropriate
strength. To date, two main applications have been
explored: early breast cancer detection and bone
regeneration monitoring. In the former, nanoparticles are
dispersed in water-based solutions and selectively
accumulate in tumor tissue. In the latter, nanoparticles
are embedded within magnetic scaffolds, serving both as
therapeutic mediators and as tools for monitoring tissue
regeneration. This work reviews the key aspects of
contrast-enhanced microwave imaging, along with the
specific requirements of these two applications. Then, the
design and implementation of a dual-purpose microwave
tomographic system capable of supporting both use cases is
presented.

Innovative optimization strategy is applied to design a
well-matched maximum-gain Yagi-Uda antenna. Optimal
parameters of the antenna, as well as the resulting gain in
forward direction are shown for n = 2k directors, where k
goes from 0 to 10. Optimization strategy and reason for its
development are described.

In this paper, we present a framework for estimating the
human head geometry using microwave imaging. To evaluate
the proposed approach, a realistic NEVA head phantom
comprising eight tissue types was considered. The
single-step microwave imaging results, obtained using
limited prior knowledge of the outer head shape,
demonstrate that the brain boundary, outer skull boundary,
and skin boundary can be successfully detected using the
considered antenna array.

In this paper, an extended neural model based on the
Multilayer Perceptron (MLP) architecture is proposed for
predicting the S11 parameter of a bifilar helix antenna.
This work builds on previous artificial neural network
(ANN) models by extending the operating frequency range to
1–2 GHz, thereby covering both GPS and GLONASS navigation
bands, and by introducing a more robust multi-parameter
approach. The proposed model uses the following input
parameters: the radius of the helix, the thickness of the
helix wire, the spacing between turns, the number of turns,
the coaxial cable characteristic impedance, and the
operating frequency. The training and testing datasets were
generated through rigorous electromagnetic (EM)
simulations. The results demonstrate excellent accuracy and
a significant reduction in computational time.

We demonstrate an optimization procedure of a
typical capacitor-based tuning network for transmission-line
RF coils in magnetic resonance imaging (MRI) using real-time
tuning performed within a circuit-based solver. Rapid solver
response is facilitated by employing closed-form models and
the results are verified by a full-wave electromagnetic
analysis
in a single run. In addition, we propose, design, and
manufacture an 8-way lumped-element power-splitting and
phasing network for an 8-channel transmission-line coil. The
design is validated by measurements on a manufactured
prototype.

A compact uniplanar circularly polarized slot antenna
intended for short-range Doppler biosensing radar
applications operating at 2.4 GHz, is presented in this
paper. The proposed antenna is based on open-ring slot
resonators excited by a microstrip feeding structure. The
antenna is implemented on an FR4 substrate and designed to
provide compact dimensions, satisfactory impedance
matching, low axial ratio, and reduced mutual coupling
between adjacent antennas.
Simulated results, performed in CST, show that the proposed
antenna achieves good impedance matching at the operating
frequency, an axial ratio below 1 dB, and a realized gain
of approximately 4 dBi. Mutual isolation between closely
positioned antennas is analyzed for different antenna
configurations and separation distances. The obtained
results demonstrate that the proposed antenna structure
provides satisfactory isolation performance, making it
suitable for compact Doppler biosensing radar systems.

Prikazana je mogućnost rekonstrukcije bitova
protokola HDMI signala analizom radijacione emisije
magnetskog
polja, što otvara mogućnost beskontaktne rekonstrukcije
slike
monitora računara. U radu je objašnjen HDMI protokol, kao i
na
koji način se vrši prenos signala. Prikazana je
eksperimentalna
postavka koja se sastoji od PCB HDMI test pločice za merenje
signala, osciloskopa, pasivnih sondi i magnetske sonde.
Takođe,
prikazani su rezultati merenja, koji se sastoje od
vremenskog
prikaza protokola HDMI signala na osciloskopu, kao i
vremenskog
prikaza signala snimljenog sondom bliskog polja. Izvršena je
obrada signala sa magnetkse sonde, u cilju detekcije emisije
magnetskog polja, određivanjem trenutka tranzicije stanja
bitova
na liniji i rekonstrukcije HDMI protokola. Na samom kraju
izvedeni su zaključci eksperimenta.

Pored tradicionalnih metoda za dijagnostikovanje preloma
kostiju, u koje spadaju kompjuterska tomografija i
magnetska rezonansa, istraživanje odgovarajućih
dijagnostičkih metoda primenom mikrotalasnog formiranja
slike privlači sve više pažnje poslednjih godina. Ova
tehnika zasniva se na merenju refleksije od antena i
transmisije između antena postavljenih u okolini organa od
interesa. U ovom radu prikazano je elektromagnetsko
modelovanje preloma tibijalne kosti (lat. tibia) i pratećeg
hematoma. Pokazano je kako pojednostavljivanje detaljnog
modela potkolenice utiče na s-parametre antena,
postavljenih u vazduhu oko modela, u frekvencijskom opsegu
od 0,7 GHz do 1 GHz.