The IoT (Internet of Things) system plays an important role in our day-to-day life as it enhances our lives by connecting a smart home atmosphere and by building a concept of smart city. The Industrial sector is facing many problems in technical, operational field and security of the connection. The mostly used technology for communication with IoT systems is LTE and 3GPP because these techniques offer low-cost operation, wide area cover and easiness in the management. But this cellular infrastructure is not up to date to support Machine-type communications (MTC). Nowadays IoT systems use ZigBee, BLE (Bluetooth Low Energy) and cellular communications (3GPP, LTE). The Evolving 5G technology offers high data with large area of coverage and low latency for MTC communication as compared to 4G network.

The SIW-based self-multiplexed antenna integrated with decoupling network working over 5G offers small footprint and compact size and is easily realized with highly demanding IoT systems.


In future, 5G communication will change our lifestyle in industry and society. Massive research like smart city, robotics and healthcare are incorporated with 5G communication network which leads to tremendous change in our daily life. 5G with IoT applications defines as a new opening generation for integration of intelligence with comfort and security.

• Transition from normal to smart communication

•Excellence of services

• Artificial intelligence and edge intelligence

• Vehicular technology in 5G and beyond – Intelligent aerial vehicles, Intelligent car without man, Intelligent transportation, Intelligent robotics system.


Microwave and RF based components has significant role in the field of communication. It is a planar form of rectangular waveguide and a dielectric is placed between two parallel metal plates. The future wireless communication with SIW technology enhances towards increased performance, high reliability, and good stability. It also offers advantages like cost effective, and it is mostly suitable for mass production in wireless communication system. It also combines the advantages of microstrip (compact size, low weight, low cost) and metallic waveguide (complete shielding, high power handling capacity and low loss).


Ø SELF-DIPLEXING TECHNIQUE – In this technique, the antenna is made up of two ports of different frequencies as uplink and downlink. It is used to reduce complexity which leads to small size and low cost.
Ø SELF-TRIPLEXING TECHNIQUE – Higher order diplexer and triplexer which provide ease for connectivity to multi-band antenna to multiple transmitter / receivers.
Ø SELF-QUADPLEXING TECHNIQUE – In this technique, quad band antenna is connected to element as quadplexer which provides low mutual coupling among the inputs.

The triplexers are used in RF front end system for filtering and selecting required frequencies for further communication. These antennas in RF field are introduced to remove the extra circuitry from communication system. Self Quadplexing antennas are mostly used in satellite, RADAR, RF- based systems to eliminate unwanted frequencies and noise.


The SIW technology based self-diplexing, self-triplexing and self-quadplexing antenna helps to achieve high isolation and low mutual coupling between transmitting and receiving antenna. These antennas are less expensive, light weight, minimum amount of losses and it can be easily incorporated with 5G-enabled and IoT-based applications. Will the upcoming era become fully 5G IoT-enabled communication and become a great fit choice for RF researchers and engineers?