[4] A few years after founding SIAE, Edoardo Mascetti co-founded in 1958 Microelettronica S.p.A., a company whose business was the design of telecommunication equipment for radio and landline systems and which was initially located in a basement in Milan.

In 1963, the two complementary companies were merged into Siae Microelettronica S.p.A. and the headquarters was moved to the nearby town of Cologno Monzese, where a larger area was available to accommodate the new offices and manufacturing plant.

[citation needed] By the mid '60s, the company began growing due to its first large-scale commercialized radio transceiver: the 3-channel 3-B3 and later the RT450 (1966), capable of aggregating 48 channels into UHF band.

Similar improvements in printed board manufacturing made microstrip circuits a viable solution for increasingly high microwave frequencies and in 1978 the RT12 radio equipment boasted the first direct-conversion 2.3 GHz synthesized modulator and could aggregate 120 telephone channels.

[2] With the increased demand for traffic, higher frequencies were needed and in the second half of the 80's the company commercialized its 18 GHz radio transceiver with a capacity up to 2 Mbit/s, based on specifications of Enel.

In 1999, the offer was expanded to support high-capacity SDH traffic and a number of multiplexing equipment was developed as well to address the increased complexity and demanded flexibility of network configurations and interfaces.

The production and assembly processes began transitioning from manual to automatic SMT placement equipment in the early 2000s to cope with a volume of 15'000 radios/year while the yearly sales in 2002 increased by 25.8%.

To meet the ever-increasing demand for higher throughput without need for additional bandwidth, which is licensed at a price in most dedicated bands, frequency reuse dominated subsequent industrial developments and the adoption of dual-polarization techniques was commercially proposed in 2007, when the company and Vodafone (Omnitel by that time) presented the paper "2xSTM1 frequency reuse system with XPIC" at the European Conference on Fixed Wireless Network Technologies 2007 in Paris.

In 2014, the product portfolio included also V band radios for small cell backhaul and NLOS solutions for urban communications which may benefit from exploiting reflections on buildings in order to increase coverage.

[25][26][27][28][29][30] From 2014 to 2016, through its entirely owned company "Twist-off" in Padua (Italy), Siae Microelettronica was active in researching applications of Orbital Angular Momentum of light (OAM) communications applied to long-distance links.

[40] Near field properties of OAM beams at microwaves have also been investigated[41][42][43] resulting in valid theoretical and practical demonstrations to lay the ground for short-range secure communications with application to contactless payments and transactions, filed under a dedicated patent.

[47][48] In 2016, an internal team of researchers coauthored the "Receiver", "Modem" and "Antenna" chapters in a comprehensive book describing electronic design of transceiver frontends for backhauling.

"[50] Since 2018, Siae Microelettronica is institutional partner of the Politecnico di Milano Foundation, as expression of its tight relationship with the university community and the increasingly strategic cooperation between technological companies and academic researchers.