Planar patch antenna
Integrated directly into the PCB. Low footprint, easy to produce in series. Ideal for compact IoT devices and plastic enclosures.
WiFi 2.4 GHz
WiFi 5 GHz
Bluetooth
In-house expertise
RF
Specialist
Custom antenna design, RF qualification and full independence on your radio projects — a rare expertise in an electronics design office.
Why this is rare
An in-house RF specialist,
An in-house RF specialist,
not outsourced
Most design offices outsource the radio frequency part. At Codium, we made the opposite choice: a dedicated RF engineer present from the design phase. The result: no information loss, faster iterations and total consistency between the board and the antenna.
This independence allows us to design, measure and qualify your antennas without relying on an external supplier — a decisive advantage for IoT, LTE-M, DECT NR+ and LPWAN projects.
4
Antenna types mastered
868MHz
to 5.8 GHz covered
176
Countries certifiable (RED)
100%
In-house — zero outsourcing
What we design
Patch
Dipole
PIFA
Slot
Array
Matching
Custom Antennas
Each radio technology has its own frequency, directivity and integration constraints. We select and design the antenna best suited to your product.
Dipole antenna
Omnidirectional radiation pattern, ideal for maximum range applications. Available in wire format or integrated PCB depending on mechanical constraints.
PIFA antenna
Planar Inverted-F Antenna — compact, wideband and low sensitivity to surrounding materials. The reference for cellular equipment (4G, LTE-M, NB-IoT).
LTE-M
NB-IoT
4G
DECT NR+
Slot antenna
Cut into the PCB ground plane. Excellent mechanical robustness, resistant to harsh industrial environments.
Industrial
868 MHz
ISM
Antenna array
Combination of multiple radiating elements for increased directional gain. Applications: localisation, short-range radar, point-to-point communications.
5.8 GHz
Directional
High gain
RF line matching
Optimisation of the matching network between the radio module and the antenna. S11 reflection coefficient measurement, impedance mismatch correction.
All modules
S11 measurement
Smith chart
Frequency bands covered
All IoT radio technologies
From 169 MHz (long-range rural LoRa) to 5.8 GHz (WiFi AC), our RF engineer masters the full spectrum used in modern electronic products.
Each technology imposes its own impedance, directivity and PCB integration constraints. We dimension the antenna taking into account your enclosure, ground plane and surrounding components.
| Technology | Frequency | Use |
|---|---|---|
| LoRa / Sigfox | 868 MHz / 915 MHz | LPWAN |
| LTE-M / NB-IoT | 700 – 900 MHz | Cellular IoT |
| DECT NR+ | 1 880 – 1 930 MHz | LPWAN |
| Bluetooth / BLE | 2.4 GHz | Short range |
| WiFi 2.4 GHz | 2.412 – 2.484 GHz | WiFi |
| WiFi 5 GHz | 5.15 – 5.85 GHz | WiFi AC |
| Zigbee / Thread | 2.4 GHz | Mesh |
What we do
RF Services
Custom antenna design
PCB-integrated antenna design (patch, PIFA, dipole, slot) based on your target frequency, enclosure and mechanical constraints.
Measurement & qualification
Antenna characterisation: S11 measurement (reflection coefficient), radiation pattern, gain and efficiency. Identification and correction of impedance mismatches.
EMC / RED certification preparation
Complete technical file for the RED (Radio Equipment Directive). EMC pre-tests, radiated emission measurements and support through to CE marking.
Existing module optimisation
Enhancement of an existing RF design: matching network tuning, filter addition, transmission line optimisation.
Module / chipset implementation
Integration of certified modules (Nordic nRF9161, Quectel BG95, Murata). Careful RF routing, impedance constraint compliance.
RF audit of existing project
RF diagnosis of a product experiencing range, interference or spurious emission issues. Audit report and corrective action plan.
Our method
From requirement to certified product
1
Scoping
Target frequencies, mechanical constraints, link budget and applicable standard
2
Design
Simulation, antenna dimensioning and matching network design
3
Prototyping
First prototype manufacturing and S11 measurements on network analyser
4
Optimisation
Iterations on geometry, matching components and PCB routing
5
Certification
Complete RED file and support in accredited laboratory
The team
Our RF Specialist
Pierre Belloche
RF Engineer — Codium Partner
A graduate in Electrical Engineering and Telecommunications from INSA Lyon, Pierre gained his antenna expertise at Amphenol Antennas before joining Codium as a partner. He leads all radio frequency projects in the design office: from initial dimensioning through to final qualification.
A licensed amateur radio operator (callsign F4IYZ), he practises radio communications in the broadest sense — a technical culture that enriches his approach to client projects every day.
INSA Lyon – Electrical Engineering
Amphenol Antennas
Amateur Radio F4IYZ
RED Directive / CE
LTE-M · NB-IoT · WiFi · BLE
A project with a radio component?
Talk directly to our RF engineer. First discussion free, no commitment.