Test Solutions for Mobile and Wireless Communication
Cost-reduction in the design and verification phase
Devices for mobile communication, such as mobile phones and wireless networks have become articles of daily use. The complexity of these devices grows constantly, similarly to the corresponding radio transmission standards. Components of mobile communications are also increasingly used in automobiles to increase driving comfort and safety. This trend requires extensive testing of new developed devices regarding their compatibility with various wireless standards.
Emulation of Air Interfaces
Testing communication systems in the field necessary but cumbersome and expensive. Whenever possible the testing has to be transferred to the laboratory environment, in order to achieve reproducible and reliable results. Emulating the propagation of the signals over the air can be achieved by using air interface emulation devices connected to the communication systems in conducted mode, modifying the physical channel on RF level: amplitude, phase, delay. BNT offers various models, targeting typical situations even with more than two communication terminals involved (hand-over testing, V2X scenario testing).
QATT – Programmable Attenuators
With the aid of the QATT devices, field strength scenarios with four independent RF channels are possible.The QATT device is usable in cellular and broadcast applications up to 4 GHz. For wireless networks WLAN 802.11 a / h, b, g, n, p, Bluetooth, ZigBee, 5G and radar applications the device QATT-7G is available.
|
|
QATT |
QATT-7G |
| Frequency range |
100 kHz … 4000 MHz |
100 kHz … 7000 MHz |
| Number of channels |
4 |
4 |
|
Insertion Loss |
6 dB, f ≤ 1 GHz |
8 dB, f ≤ 5 GHz |
|
Setting range |
0 … 100 dB |
0 … 95.25 dB |
|
Resolution |
0.5 dB |
0.25 dB |
|
Port load capability |
+27 dBm |
+24 dBm |
|
LAN remote interface |
✓ |
✓ |
|
USB remote interface |
✓ |
✓ |
|
Web-interface |
✓ |
✓ |
QDLL – Quad Delay Line
The device QDLL is a 4-channel programmable delay line for the frequency range 250 MHz ... 4000 MHz. Each RF channel provides a setting range of 0 ... 1700 ps and is adjustable in 5 ps steps.
|
|
QDLL |
|
Frequency range |
250 MHz … 4000 MHz |
|
Number of channels |
4 |
|
Insertion Loss |
6.5 dB |
|
Setting range |
0 … 1700 ps per channel |
|
Resolution |
5 ps |
|
Port load capability |
+33 dBm |
|
LAN remote interface |
✓ |
|
USB remote interface |
✓ |
|
Web-interface |
✓ |
Programmable 4 Channel Delay Line
250 ... 4000 MHz Delay range 0 ... 1700 ps step size 5 ps
AIE-4X4LR – Air interface Emulator
The AIE-4X4LR is a 4 to 4 port radio field simulation for the generation of handover test scenarios.
|
|
AIE-4X4LR |
|
Frequency range |
500 MHz…9000 MHz |
|
Number of channels |
4 x 4 (4 Inputs, 4 Outputs) |
|
Insertion loss |
21 dB @ 0 dB ATT / @ 2 GHz |
|
Attenuation range |
0 … 63.5 dB (0 ... 127.0 dB) |
|
Attenuation resolution |
0.25 dB |
|
Port load capacity |
+33 dBm |
|
LAN interface |
✓ |
|
USB interface |
✓ |
4X4 Channel Air Interface Emulator, 500…9000 MHz
step size 0.25 dB 500 ... 9000 MHz attenuation range 0 up to 127.0 dB
AIE-W5LR – 5 Port Car-to-X Emulator
The AIE-W5LR is a radio field simulator for Car-to-X applications. Each RF port is designed for bidirectional operation and is connected to each of the remaining ports via adjustable attenuators. The device is designed for operation from 500 MHz up to 9000 MHz and thus also suitable for the WLAN standard IEE 802.11p as well as Wi-Fi 6E 802.11ax in V2X and V2V applications.
|
AIE-W5LR |
|
|
Frequency range |
500 MHz … 9000 MHz |
|
Number of channels |
5 |
|
Insertion loss |
23 dB @ 0 dB ATT, 2 GHz |
|
Atennuation range |
0 … 127.0 dB |
|
Attenuation resolution |
0.25 dB |
|
Port load capacity |
+33 dBm |
|
LAN interface |
✓ |
|
USB interface |
✓ |
|
Trigger input |
✓ |
5 Port Air Interface Emulator, 500 bis 9000 MHz
step size 0.25 dB 500 ... 9000 MHz attenuation range 0 up to 127.0 dB
Frequency Range
For universal use, the operating bandwidth should be as large as possible. The system should be suitable for all components of e.g. such as GSM800, GSM900, GSM1800, GSM1900 UMTS, LTE.
Port Load Capability
The load capacity of the HF ports should be adapted to the connection of mobile phones and wireless network devices.
Accuracy of Adjustment
Reproducible results will ensure by fine resolution with high accuracy in adjustment.
Port-Decoupling
High decoupling properties of the RF ports ensure a sufficient suppression of adjacent test pieces to avoid mutual interference.
Remote Control
Via remote control interfaces, such as Ethernet LAN or USB, the radio field simulations can be integrated into automatic test sequences. Many devices are additionally equipped with web interfaces, which provide a location-independent control of the devices without additional software on the user's side.
Robust Design
In production and development, high quality and availability of the RF signal is immeasurably. The components comply with these requirements and are designed for longstanding operation.
Latest modification: 26.04.2023