In water and gas smart meters, the reliability of radio communication does not depend only on the technology used. It also depends on how the antenna operates inside the real device and under the actual installation conditions.
A smart meter may successfully pass laboratory tests and still show critical issues in the field, when it is installed in a pit, in a metal enclosure, in a technical room, in a basement, near pipes, water, metal masses, batteries, cabling and electronic components.
In these contexts, the antenna should not be considered a component to be added to the meter once the project is complete. It is part of the RF architecture and can contribute to the continuity of remote meter reading, the energy efficiency of the device, the stability of the connection and the reliability of the service.
ElettroMagnetic Services Srl designs and manufactures custom integrated antennas and tailor-made antenna systems for water and gas smart meters, developed starting from the real device, the enclosure, the electronic board, the battery, the mechanical constraints and the expected operating conditions.
Integrated antennas for smart meters and custom antennas for smart meters must be developed by considering, from the very beginning, the real device, the radio technology used, the enclosure, the battery, the electronic layout and the installation conditions expected in the field.
We do not supply complete smart meters, nor do we develop active electronics, radio modules or remote meter reading platforms. Our contribution concerns the antenna part: design, optimisation, manufacturing and characterisation of custom integrated antennas and antenna systems intended to be integrated into the Customer’s RF devices.
The objective is to help the Customer develop an antenna solution that is consistent with the RF architecture, the real meter and the environment in which it will have to operate.
Antennas for water and gas smart meters
In smart metering systems, radio communication must remain reliable for many years, often without frequent intervention on the device.
This makes antenna design particularly important. Inefficient communication may require multiple transmission attempts, increase energy consumption, reduce battery life or cause missed readings.
For the smart meter manufacturer, the issue is not only making the meter work during the development phase. The real objective is to achieve stable communication after field installation, under the real conditions in which the device will have to operate.
A tailor-made antenna solution makes it possible to address the RF criticalities of the meter from the very beginning, improving the consistency between expected performance, device architecture and operating conditions.
Antennas for smart meters and antennas for smart metering must therefore be evaluated not only in relation to the selected radio technology, but also in relation to the required autonomy, the continuity of remote meter reading, the stability of the connection and the real conditions in which the meter will be installed.
Why a standard antenna may not be enough
A datasheet does not always describe how the antenna will behave in the actual conditions of use.
A smart meter presents very specific constraints: limited available space, compact enclosure, fixed electronic board, battery, components close to the antenna and orientation that cannot always be controlled after installation.
In addition to these elements, there is the environment in which the meter is installed. Water, pipes, walls, pits, boxes, manhole covers or metal elements can modify the RF behaviour of the solution and make the real performance different from the performance measured under ideal conditions.
In these cases, the issue is not only choosing an antenna compatible with the required electrical specifications. The point is to understand whether that solution can work in the real meter, in the available position and in the environment in which the smart meter will have to operate.
A custom design reduces the distance between nominal performance and real behaviour, transforming the constraints of the meter into concrete design criteria.
Critical installations: pits, metal enclosures and technical rooms
Water and gas smart meters are often installed in complex RF environments.
A water meter may be located in an underground pit, in the presence of humidity, water, soil, concrete, metal manhole covers and very limited space. A gas meter may be installed inside a technical cabinet, in a niche, in a metal enclosure or close to pipes and fittings.
In both cases, the installation environment can significantly affect signal propagation and communication stability.
Antennas for water and gas meters must therefore be designed by considering the real installation environment, because pits, metal enclosures, technical rooms, pipes, humidity, water and metal masses can modify RF behaviour compared to laboratory conditions.
For this reason, the antenna should not be evaluated only as an isolated component, but as part of the system formed by the meter, enclosure, electronics, battery, mounting position and installation context.
A custom solution makes it possible to develop a smart meter that is more consistent from an RF point of view, reducing the uncertainty between laboratory performance and real field performance.
Antennas for NB-IoT, LTE-M, Wireless M-Bus and LoRaWAN
Water and gas smart meters may use different communication technologies, such as NB-IoT, LTE-M, Wireless M-Bus, LoRaWAN or Bluetooth for local configuration and maintenance.
However, the selected radio technology alone does not guarantee the reliability of remote meter reading. A suitable module may lose effectiveness if the antenna is not consistent with the meter, the available position and the installation environment.
This is particularly important in compact meters, where the available space is limited and the antenna has to coexist with the enclosure, the electronic board, the battery and other internal elements.
A custom design allows the antenna to be developed according to the selected radio technology, the geometry of the meter and the communication objectives required by the project.
NB-IoT antennas for smart meters, LTE-M antennas for meters, Wireless M-Bus antennas for meters and LoRaWAN antennas for meters must be developed by taking into account the different requirements in terms of bandwidth, efficiency, coverage, autonomy and mechanical integration into the real device.
Integrated antenna, battery and energy efficiency
In battery-powered smart meters, the efficiency of the radio link is directly connected to the operating life of the device.
A non-optimised antenna can reduce the communication margin and force the system to operate under less favourable conditions, with higher consumption or lower long-term stability.
This aspect is particularly important in water and gas meters, where physical access to the device may be difficult and maintenance must be reduced to a minimum.
Designing the antenna together with the device makes it possible to evaluate, from the very beginning, the interaction between antenna, battery, electronic board, enclosure and installation point.
The advantage is a solution that is more consistent with the objectives of autonomy, reliability and service continuity.
Antennas integrated into the meter enclosure
In many smart meters, the antenna must be integrated directly into the plastic enclosure or into the available space close to the electronics.
This integration must take into account the actual shape of the product, the assembly constraints, the position of the electronic board, the presence of the battery and the expected installation conditions.
Even small variations in the antenna position or in the geometry of the enclosure can modify the RF behaviour of the device.
For this reason, ElettroMagnetic Services Srl develops custom integrated antennas by working on the real device, not only on an ideal model.
Integrated smart meter antennas must in fact be optimised in relation to the actual shape of the meter, the materials of the enclosure, the position of the electronic board, the presence of the battery and the production constraints of the device.
In this way, it is possible to obtain a solution that is more suitable for the actual shape of the meter, the industrial constraints and the expected installation conditions.
From the laboratory to the field: reducing the risk of missed readings
A smart meter may work correctly in the laboratory and show critical issues only after field installation.
This happens because the laboratory does not always reproduce the complexity of the real environment: pits, metal enclosures, pipes, water, walls, technical rooms, meter orientation and the presence of obstacles can modify the behaviour of the radio link.
Missed readings, unstable connections or the need for corrective interventions can generate operating costs, service disruptions and a loss of perceived reliability for the end Customer.
Antennas for remote meter reading must contribute to the stability of radio communication under real installation conditions, reducing the risk of missed readings, retransmissions, higher-than-expected energy consumption and corrective interventions in the field.
A custom design reduces the risk that the real RF behaviour will be very different from the expected one, addressing from the beginning the conditions that may affect performance.
From the smart meter requirement to the antenna solution
Every integrated antenna project for water and gas smart meters starts from the analysis of the application scenario.
ElettroMagnetic Services Srl evaluates together with the Customer the radio technology used, the geometry of the meter, the available position for the antenna, the enclosure, the electronic board, the battery, the assembly constraints, the installation conditions and the autonomy and communication objectives.
From this analysis, a tailor-made antenna solution is developed through electromagnetic simulation, prototyping, optimisation on the real device, measurements and characterisation in an anechoic chamber.
This process makes it possible to transform the constraints of the meter into design criteria, reducing the uncertainty between expected performance and real behaviour.
The advantage for the smart meter manufacturer
Involving ElettroMagnetic Services Srl in the design of integrated antennas for water and gas smart meters means addressing the RF part related to the antenna while design choices are still open.
This makes it possible to avoid standard antennas that are not optimised for the real meter, reduce the risk of RF criticalities in the advanced stages of industrialisation and develop an antenna solution that is consistent with the RF architecture, the final device and the installation environment.
It also means being able to verify the behaviour of the antenna or antenna system through measurements and characterisation in an anechoic chamber before delivery.
In water and gas smart meters, the antenna must not work only inside the device. It must work inside the device installed in its real environment. For this reason, it should be evaluated from the earliest stages of definition of the RF architecture and the meter, when position, enclosure, battery, electronic board and assembly constraints can still be optimised.
Custom antennas for your water or gas smart meter
If you are developing a water or gas smart meter with NB-IoT, LTE-M, Wireless M-Bus, LoRaWAN, Bluetooth or other radio technologies, ElettroMagnetic Services Srl can support you in the development of the custom integrated antenna best suited to your smart meter.
Tell us about your project: radio technology, meter geometry, enclosure, available position for the antenna, battery, assembly constraints, installation conditions and expected performance are the starting point for designing an antenna solution that is truly consistent with your smart meter.
CONTACT US
TECHNICAL INSIGHTS
TEP No.3 - Types and Design of Integrated Antennas for Wireless and IoT Applications
TEP No.4 - Integrated Antennas: Electrical Specifications on Datasheet and Measurements
TEP No.6 - Coverage Problem Using a Chip Antenna in a Proprietary IoT Device
TEP No.11 - Integrated Antennas: Engineering and Industrialization
TEP No.19 - A Custom Solution for Smart Water/Gas Metering
