In order to save development and approval costs, the antenna, frequency bands, ground plane size and housing should be carefully designed at the beginning of development. If the company lacks in-house experience with radio, antennas and worldwide approval, we recommend consulting an external consultant. The following text is intended to make you think. I use […]
Data sheet NB-IoT / LTE-M modules Quectel BG77 and BG95
Simulation of a GSM quad-band antenna
Return Loss and VSWR for your antenna
Antenna Return Loss by VNA
The upper left graph illustrates the measurement of a filter with two ports at the Vector Network Analyser (VNA). Port 1 is feeding the device under test and is measuring the reflection. Port 2 is measuring the received energy. The lower right graph is showing a typical return loss measurement of an antenna. Has this […]
Principle of operation of a VNA
To explain the principle of operation of a VNA, I use an optical lens for comparison. Light arriving at the lens is partly reflected. However, a large part of the light is directed through it. The part of the light that is reflected and the part that is transmitted can be measured. A VNA measures […]
Antenna gain and beam angle
Parameters of antennas In addition to the mechanical dimensions and the type of connection, data sheets for antennas specify various electrical and physical parameters. 1. Antenna gain The antenna gain is a relative quantity that refers to a reference antenna. The reference value is the receiving field strength of the selected antenna in receiving direction […]
The 4 Cent antenna for classic Bluetooth, WiFi, ZigBee and more
Quectel BG77 – Time to change to NB-IoT and LTE-M
It’s time to switch to NB-IoT and LTE-M. With the Quectel BG77, anyone can now develop his or her own wristwatch with a cellular radio. With dimensions at only 14 mm x 15 mm, building a locating device in a matchbox is now possible. Since GNSS and cellular can be connected to one antenna interface, […]
Design process of your wireless IoT application
This is an example of a typical design process with the various steps leading to a ready-to-use wireless IoT product. Step 1 – Read the IoT/M2M Cookbook The IoT / M2M Cookbook is intended to help developers of wireless IoT / M2M devices to save some time and perhaps to provide some inspiring ideas to […]