Custom Designs
Frequency-specific design for size, gain, bandwidth, and polarization targets.
Antenas: Monopole, Dipole, Yagi-Uda, Helical, Microstrip
Phase Shifters: Reflection Type, Switched Line, Loaded Line
RF designs and prototypes
Austral Microwaves builds compact microwave rf designs for custom integration, lab evaluation, and engineering prototype work. Our works include circular and linealy polarized patch antennas, phase shifters and phased-array development hardware.
Prototype Characterization
S21, S11, radiation pattern, gain, and axial-ratio report-ready plots for engineering review.
Phased Array prototyping
Development support for array architecture, feed concepts, and beamforming demos.
Our Team
Alessandro Ghezzo
Electronic Engineering Consultant
Creator
Antenna, Phase shifters, Phased arrays design & characterization Consulting.
Software Defined Radio Consulting.
ANSYS HFSS, CST Studio, Keysight ADS
SPICE, Verilog, VHDL
Designs
Measured and simulation-backed RF hardware for evaluation and integration.
Category
Antennas
8.425 GHz RHCP Patch
Compact circularly polarized reference hardware for TT&C, CubeSat, and lab work.
- Characterized matching and axial ratio
- Reference PCB with SMA connector
- Prototype and documentation package
2.245 GHz RHCP Patch
Circularly polarized S-band antenna for telemetry, CubeSat, and integration work.
- RHCP operation around 2.245 GHz
- Front and rear reference hardware
- Simulated matching, axial ratio, and gain
2x2 Phased Array
High-value development hardware for beamforming demos, research, and control experiments.
- Array architecture summary
- Biasing and calibration notes
- Beam steering prototype workflow
Category
Phase Shifters
Varactor Reflection-Type Phase Shifter
A continuously tunable phase-shifter design based on a varactor-loaded reflection topology.
- Reflection-type architecture
- Varactor-based tuning
- Measured operation from 2.0 to 2.3 GHz
- Approximately 100° of continuous phase adjustment
Discrete Switched-Line Phase Shifter
A digitally controlled PIN-diode design for repeatable, discrete phase selection in S-band systems.
- Switched-line topology
- Series PIN-diode switching
- 4-bit phase control
- I2C embedded control
Available as prototype hardware, technical documentation, and starting points for custom RF programs.
Featured Antenna
8.425 GHz X-band RHCP patch for circularly polarized microwave links.
Circularly polarized X-band reference hardware for engineering evaluation, bench characterization, and integration studies around the 8.425 GHz target.
A characterized X-band circularly polarized patch intended as engineering reference hardware for CubeSat, TT&C, and microwave integration work, with simulation, measurement, and prototype fabrication data aligned around the 8.425 GHz band.
< 3dB Axial Ratio 200 MHz
- RHCP performance centered on the target band
- Measured and simulated matching results for comparison
- Fabricated panel and connector-side hardware imagery
Simulation vs Measurement
| Parameter | Simulation | Measurement |
|---|---|---|
| Center frequency | 8.425 GHz | 8.4 GHz |
| S11 | -22 dB | -12 dB |
| Matching bandwidth (S11 < -10 dB BW) |
920 MHz | 800 ± 30 MHz |
| Broadside gain | 7.06 dBi | 6.5 dBi |
Simulated Parameters
| Parameter | Simulated value |
|---|---|
| Operating frequency | 8.425 GHz |
| Reflection coefficient at 8.425 GHz | -22.14 dB |
| -10 dB impedance bandwidth | 927.3 MHz |
| Minimum axial ratio at broadside | 0.55 dB |
| Frequency of minimum axial ratio | 8.43 GHz |
| 3 dB axial ratio bandwidth | 218.7 MHz |
| Broadside gain | 7.06 dB |
| Back-lobe attenuation | -12.32 dB |
| RHCP polarization ratio at broadside | 35.75 dB |
S-band Antenna
2.245 GHz S-band RHCP patch antenna.
Circularly polarized reference antenna for S-band telemetry, CubeSat, and microwave integration work.
Single-element RHCP patch hardware with simulated impedance, axial-ratio, and radiation-pattern characterization around the 2.245 GHz operating band.
- Approximately 60 MHz simulated -10 dB impedance bandwidth
- Approximately 15 MHz simulated 3 dB axial-ratio bandwidth
- Broadside-oriented RHCP radiation pattern
Simulation Summary
| Parameter | Simulated value |
|---|---|
| Operating frequency | 2.245 GHz |
| S11 near target | ≈ -36 dB |
| -10 dB impedance bandwidth | 59.9 MHz |
| Minimum axial ratio | 1.10 dB |
| 3 dB axial-ratio bandwidth | 15.4 MHz |
| Broadside gain | 6.92 dBi |
Featured Phase Shifter
Reflection-type phase shifter for continuous S-band phase control.
Wideband RTPS prototype hardware with voltage-controlled phase adjustment, characterized across a 300 MHz span in S-band.
This reflection-type phase shifter uses varactor tuning to provide continuous phase control from 2.0 to 2.3 GHz. Measurements across the bias range show approximately 100° of available phase adjustment throughout the characterized frequency span.
- Varactor-loaded reflection-type topology
- Continuously adjustable phase response
- Measured S-parameters across fourteen bias-voltage states
Featured Phase Shifter
Discrete switched-line phase shifter for digitally controlled S-band systems.
A four-bit RF prototype that selects discrete phase states through PIN-diode-switched transmission-line paths, with embedded I2C control for system integration.
The board combines four switched-line stages in a compact two-port format. Each stage uses series PIN-diode switching to select its RF path, enabling repeatable digital phase control from a host processor or embedded controller.
- Switched-line phase-control topology
- Series PIN-diode RF switching
- Four independently controlled phase stages
Featured Array
2x2 Phased Array for steering experiments and beam-control evaluation.
Bias-controlled S-band array hardware for beamforming development, matching studies, and measured-versus-simulated radiation analysis around 2.15 GHz.
A 2x2 patch array reference design built for CubeSat phased-array prototyping, steering validation, and RF characterization. The supporting material covers front and rear hardware views, S11 behavior across phase states, bias-current sensitivity, and measured/simulated lobe comparisons.
CubeSat Format
- Radiator and feed/control layers shown through front and back PCB views
- S11 tracked across phase configurations and polarization-bias current
- Measured and simulated angle and gain comparisons for steering evaluation
Performance Summary
| Parameter | Measurement |
|---|---|
| Operating frequency | 2.15 GHz |
| Bandwidth | 20 MHz |
| S11 | -16.56 dB |
| Broadside Gain | 7.83 dBi |
| Phase resolution | 5° |
| HPBW | [28°-38°] |
| Scan range | ±40° |
Contact
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Share the target frequency, bandwidth, polarization, size limits, and integration constraints to scope prototype hardware or custom design work.
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