Development projects according to technical focus

Bluetooth module for power tools

We defined the radio standard, range, transmission power, supply, interfaces and installation space and selected the Bluetooth SoC, RF components, filters and matching network.

We developed the circuit diagram and impedance-controlled PCB layout as well as the integrated antenna, taking the housing and installation situation into account. EM simulations were used to optimize impedance matching, efficiency and radiation.

After building and commissioning the prototypes, we measured S-parameters, output power, antenna efficiency and range. The measurement results were incorporated into the circuit, layout and antenna as well as into the production documents.

Bluetooth antenna for an electronic lock

We examined the available installation space and the electromagnetic interactions between the 2.4 GHz antenna, circuit board, battery, housing and metal lock mechanism.

In the EM simulation we compared the antenna position, feeding, ground routing and matching network. We tested S-parameters, bandwidth, efficiency, radiation pattern and range on modified prototypes.

From the comparison of simulation and measurement, we derived concrete changes for antenna position, impedance matching and housing integration and evaluated the connection quality when installed.

Antennas for counter-drone systems

We developed antenna concepts for the specified bandwidths, performance requirements, polarizations, directional characteristics and installation environments.

We examined impedance matching, gain, field distribution and mutual influence using EM simulations. The antenna structure, feed, mechanical structure and thermal resilience were coordinated.

We characterized bandwidth, gain, radiation pattern, polarization, efficiency and power handling on samples. We prepared manufacturing documentation and a test concept, and supported assembly and testing.

Multi-standard antennas on a system board

We planned to have one LTE antenna, two Wi-Fi and two VTX antennas, as well as one each of UWB, Bluetooth and dual-band GNSS antennas on the same system board.

Antenna positions, ground planes, interference sources and shielding were evaluated together. EM simulations and layout optimization addressed matching, decoupling, coexistence, and controlled impedance; the GNSS path included LNA, filtering and power supply.

We measured S-parameters, decoupling, efficiency and radiation pattern and then optimized antenna positions, RF paths and matching networks for system integration.

LTE antennas in a telemetry sensor

We evaluated the influence of the circuit board, housing, battery, sensors, cables and mounting position on the LTE antennas of a compact sensor.

We measured S-parameters, bandwidth, efficiency, decoupling, TRP/TIS and directional characteristics on modified prototypes and compared antenna variants under realistic operating conditions.

We optimized the antenna position, RF path, matching, ground concept and decoupling and documented the measures for series-oriented integration.

LTE/WLAN/Bluetooth module for vehicles

We developed a module with three LTE, two WLAN and one Bluetooth antennas. For antenna positions and housings, we considered MIMO capability, coexistence, and mechanical integration.

EM simulations and samples were used to optimize impedance matching, efficiency, feed points, cable runs and decoupling. We measured S-parameters, efficiency, radiation pattern and mutual influence.

The series implementation included production documents, parts lists, testing concepts, injection molds for the antenna housing as well as support and optimization of production.

LTE antenna for electronic displays

We analyzed LTE bands, installation space, ground planes and the interference effects of the display, electronics, housing and cables.

EM simulation and sample testing in the actual installed condition accompanied the antenna structure, feeding and matching. S-parameters, bandwidth, efficiency, reception sensitivity and range were measured.

We optimized the RF path and mechanical integration and took over manufacturing documents, testing concept as well as manufacturing and testing of the antenna.

433 MHz PCB antenna in vehicle key

We developed an antenna concept for the compact vehicle key and took into account the battery, buttons, housing, hand position and installation position.

EM simulations supported the optimization of antenna structure, feeding, ground plane, matching and impedance-controlled RF line.

We measured S-parameters, bandwidth, efficiency, radiation pattern, output power and range on prototypes and adjusted the layout based on the results.

Internal LTE antenna for telemetry data collector

We recorded the LTE bands, size and installation situation with battery, sensors, circuit board and housing and developed an internal antenna concept.

EM simulation and measurement in the installed state were used to coordinate the antenna structure, supply, matching, ground concept and RF path. S-parameters, efficiency, TRP/TIS, reception sensitivity and range were evaluated.

We then took over design for manufacturing, manufacturing documents, testing concept as well as production, assembly and quality testing of the antennas.

Z-Wave and Bluetooth for connected displays

We developed Z-Wave and 2.4 GHz Bluetooth antennas for the existing installation space and examined the influence of the display, housing and surrounding electronics.

Simulations and measurements covered impedance matching, bandwidth, efficiency, radiation pattern, decoupling, reception sensitivity and range in the real installation state.

The results led to changes to antenna structures, matching, ground routing and RF paths; the final configurations and measurement results were documented.

5G multi-band antennas

Development of several antenna variants for reference and test systems in the range 600 MHz to 6 GHz.

Radio technology in bicycles

Bluetooth, WLAN and Sigfox antennas in bicycles and e-bikes; Field analysis of radiation in metal and carbon frames.

Wireless power for implants

Transmitter, receiver and coils for contactless energy transfer to implanted devices at 100–200 kHz.

MIMO for industrial PCs

Multiband MIMO antennas for WLAN, WiMAX, UMTS and LTE in industrial computers.

Vehicle communication

Multi-band GSM/UMTS, LTE-MIMO and UWB antennas as well as RF couplers and ISM transceivers for vehicles.

Mobile phone and base station antennas

Tri-band GSM and Bluetooth antennas for mobile phones, and dual-polarized GSM1800/DECT/UMTS base-station antennas.

Dielectric resonator antennas

Investigation of DRA technologies for GSM, WLAN, WiMAX and UMTS.

Portable WiFi devices

Simulation and development of PCB antennas for portable devices in the 2.45 GHz WLAN band.

Bus ticket system

Diversity LTE and WLAN antennas for a multimedia ticket and information system.

Bicycle console

Integrated GPS, Bluetooth and UMTS antennas for control units on the bicycle.

LTE-MIMO and active GNSS for railway technology

We designed the positioning and decoupling of two LTE MIMO antennas and an active GNSS antenna under the specifications of the housing, ground planes and sources of interference.

The GNSS path included an LNA, filtering, power supply, protective circuitry and RF matching. We simulated antennas, matching networks and transmission-line paths, then optimized the impedance-controlled layout.

Prototypes were examined for S-parameters, decoupling, efficiency, radiation pattern, reception sensitivity and GNSS signal quality. The results led to adjustments to positions, paths and LNA integration.

VHF antenna integration on the aircraft

We investigated directional antennas at 164 MHz on the aircraft. We first measured the installed antennas and cables separately and as a complete signal path using a vector network analyzer.

The electromagnetic models depicted the antenna in free space as well as with the aircraft structure, bracket and mounting accessories. We compared position, distance and tilt and calculated the effects on impedance matching, surface currents and spatial radiation pattern.

By comparing the variants, we derived recommendations for installation and antenna position. Separating the radiating element, feed line and installation environment systematically also forms the basis for comparable tasks on other aircraft.

Antenna assemblies for scientific space telemetry

We carried out the simulation and metrological investigation of transmitting and receiving antennas for scientific telemetry links at 402.25 and 468.25 MHz. The designs examined included circularly polarized patch and quadrifilar helix antennas as well as antenna groups with phase-controlled feeding.

We assessed radiating elements, radomes, feed networks and active receive components separately and together. The scope included preparation of measurement campaigns, impedance measurements and evaluation of gain, radiation pattern, half-power beamwidth and axial ratio; phase center was also investigated in the corresponding test setups.

The results were documented for the comparison of the electromagnetic model and the real assembly. For new projects, we coordinate the scope of measurement, model level, interfaces and required evidence on a mission-related basis.

Satellite and Aviation

Antenna systems for space applications, LTE and base station antennas in aircraft as well as field analysis and radome measurements.

GNSS front end

Active GPS/Galileo/GLONASS distribution with integrated LNA in the 1–1.6 GHz range as well as GPS/Iridium antenna module with RF switching around 1.6 GHz.

9.65 GHz satellite calibration

Antenna system for satellite calibration in the X-band.

14.85 GHz aircraft communications

High gain planar antennas for aircraft communications applications.

GNSS patch arrays

Circularly polarized GPS/GLONASS patch arrays, including for rail applications.

Active GNSS in shipping

Active patch array for a high-precision maritime GPS receiver.

Aircraft radome

Examination of a radome and measurement of the associated aviation antenna.

Aircraft radio coverage

Multiband access and base station antennas for intra-aircraft communications.

RF filter for drone controls

We defined the frequency range, passband loss, stopband attenuation, transition steepness, power handling, impedance and available space, then selected suitable filter topologies.

Circuit and EM simulations accompanied the design. We optimized trace geometry, couplings, ground concept, via fencing, shielding and parasitic effects in the PCB layout.

We measured S-parameters, insertion loss, return loss, stopband behavior and harmonic suppression on prototypes. After several iterations, we took responsibility for manufacturing documentation, the test concept, manufacturing and testing.

RF layout review for a GPS tracker

We checked antenna connections, module placement, filters, matching, power supply and interference sources from RF, EMC and manufacturing aspects.

In the layout we checked controlled impedance, ground planes, via fencing, short signal paths and coexistence of the three wireless standards. For the GNSS path, we evaluated LNA, filtering, noise sources, and shielding.

We identified critical areas and formulated concrete changes for antenna positions, traces, ground routing, component placement, matching networks and test points.

RF junctions and test adapters

Optimization of line transitions and high-speed connections up to 90 GHz; Investigation of wafer probes, pogo pin fixtures and wire bond modules at 20 GHz.

Smartphone RF Coupler

Antenna couplers and test and matching structures for different mobile phones.

Vehicle coupler

Multiband RF coupler systems for automotive applications.

ISM radio modules

Integrated antennas and transceiver assemblies for radio links in the ISM band.

System noise

Conception of a measurement method for characterizing system noise.

Compact LTE antenna for water meters

We designed the LTE antenna taking into account the battery, counter, water pipes, metal parts, housing and mounting position.

Simulations and prototype measurements in the installed state examined impedance matching, bandwidth, efficiency, radiation pattern, TRP/TIS, reception sensitivity and range.

Antenna structure, matching and ground concept were iteratively adjusted. We then took over the manufacturing data, testing concept, production, assembly and quality testing of the antenna.

LTE/Bluetooth transponder for asset tracking

We defined LTE bands, Bluetooth function, range, power consumption and size and selected chipsets, supply, sensors and RF components.

We developed circuit diagram and impedance controlled PCB layout including power supply, interfaces, RF paths and antenna matching. LTE and Bluetooth antennas were simulated in interaction with the battery and housing.

Prototypes were tested for S-parameters, efficiency, TRP/TIS, output power, reception sensitivity and range. Measurement results were incorporated into the layout, antennas and documents for sample and series production.

WLAN/GNSS in an outdoor light

We evaluated WLAN at 2.4 and 5 GHz as well as GNSS in the L-band in combination with metal housing, reflector, LED driver, power supply and covers.

Various antenna positions and integration variants were electromagnetically simulated. We looked at impedance matching, decoupling, polarization, radiation pattern, efficiency and possible shadowing.

Experimental setups and antenna measurements made it possible to compare WLAN coverage and GNSS reception. From this we derived recommendations for positioning, housing integration and RF adaptation.

Bluetooth AoA antenna array

We defined the number and geometry of the antenna elements, element spacing, phase reference, polarization and decoupling for the angle of arrival method.

Development included EM simulation, feeding, matching, RF switching and a symmetrical PCB layout with controlled impedance. The array was integrated with a Bluetooth module and evaluation electronics.

We measured S-parameters, decoupling, efficiency, phase position and radiation pattern on prototypes and optimized array geometry and RF paths based on the results.

Bluetooth transponder for positioning

We selected Bluetooth SoC, RF components, crystals and supplies and developed circuit diagram and PCB layout with controlled impedance.

The integrated antenna, the RF path and the matching network were simulated taking the housing into account and designed for range and stable wireless performance.

We manufactured and characterized prototypes based on S-parameters, output power, reception sensitivity, antenna efficiency and range and accompanied manufacturing documents and production testing.

Bluetooth AoA and UWB

Switchable 8×1 monopole and 4×1 patch arrays for direction finding; also UWB antenna arrays for angle determination.

Smart Lighting

Bluetooth, WiFi, Sigfox and Z-Wave antennas in LED lights, outdoor spotlights and connected lamps; WiFi at 2.45 GHz and Z-Wave at 868.42/908.42 MHz.

IoT and Smart Metering

Integrated 4G/LTE antennas, encapsulated Sigfox/LoRa antennas for level sensors and compact RFID antennas in measuring systems.

RFID 13.56 and 868 MHz

Coil antennas for readers and cards at 13.56 MHz, UHF RFID readers and tags at 868 MHz as well as active transponders and antennas in the metal frame of an industrial truck.

Bluetooth transponder antenna

Integrated Bluetooth 5.1 antenna for compact transponders and tracking systems.

Animal Tracking

Internal dual band GSM antenna for large animal monitoring and antenna and RF layout for a pet tracker.

Water level and tank monitoring

Encapsulated Sigfox/LoRa antennas for level measurement systems.

Smart door locks

Integrated antennas for keyless electronic locking systems.

Payment and NFC

Small coil antennas for payment cards and card readers at 13.56 MHz.

Handheld reader

Antenna systems for portable Bluetooth readers.

Time and access recording

Embedded 868 MHz RFID antennas for time and attendance and keyless entry.

Industrial vehicles

Integration of an RFID antenna into the metallic frame of a forklift.

2.45 GHz telemetry

Transponder systems and radio links for telemetric applications in the ISM band.

60 GHz radar

Field theoretical investigation and optimization of radar lenses for 60 GHz sensors.

5.8 GHz localization radar

Investigation and further development of antennas and arrays for local positioning radar.

24 GHz automotive radar

Development of an ACC antenna array for vehicle distance detection.

2.45 GHz microwave system

Development of a high-power microwave system for professional cooking appliances.

Other RF systems

Waveguide feed systems, antenna couplers for smartphones, system noise measurement methods and antenna measurements on aircraft.

Microwave feeds

Open and slotted waveguide structures for data transmission systems.

200 GHz waveguide antenna

Development of a waveguide antenna for a specialized application at 200 GHz.