Siae Microelettronica

Siae Microelettronica is an Italian telecommunications technology company headquartered in Milan. Its core business is the design and supply of equipment used to connect mobile, fixed, utility, and enterprise networks. The company is particularly associated with wireless backhaul and fronthaul: the radio links that carry traffic between cell sites, aggregation points, and core networks. Its portfolio has evolved from traditional telephone multiplexing and analog radio systems to digital microwave, millimeter-wave, full-IP, dual-polarization, software-defined, and high-capacity transport platforms. Through its subsidiary SM Optics, the group also operates in optical transmission and network-management technologies. The business originated with Edoardo Mascetti, an electrical engineer who had worked as an electronic designer at Siemens. In 1952 he established SIAE, an acronym derived from Società Italiana Apparecchiature Elettroniche. The original company made electronic measurement equipment, including testers, oscilloscopes, telephone-system analyzers, and signal generators. Mascetti later co-founded Microelettronica S.p.A. in 1958 to develop equipment for telecommunications over radio and landline systems. The two complementary businesses were combined in 1963 as Siae Microelettronica S.p.A., with operations moving to larger premises in Cologno Monzese near Milan. During its first decades, the company supplied analog multiplexing equipment to telephone operators and worked with ENEL on supervision and communications systems for the Italian electricity distribution network. It expanded into radio transceivers, power-line communications, vehicle communications, security systems, and television transmission equipment. Its radio products progressed from early multi-channel systems to higher-frequency and higher-capacity microwave platforms. The company also supplied a historic communications link for the Milan and Rome offices of the newspaper Corriere della Sera and developed broadcasting equipment for RAI. The 1980s brought digital modulation, international expansion, more advanced microwave manufacturing, and the introduction of the split-mount architecture. In this configuration, an indoor unit performs network-interface and baseband functions while an outdoor unit handles radio-frequency conversion near the antenna. The architecture became an important foundation for later generations of transport equipment. Siae expanded into markets including Norway, the United Kingdom, and other European countries, while partnerships with utilities and network operators helped it address national-scale communications networks. In the 1990s, the company moved decisively toward high-capacity digital transport. It supplied SDH microwave equipment to SIP, later associated with Telecom Italia, and developed network-management software for supervising complex radio networks. It also entered the rapidly expanding cellular infrastructure market with products designed for GSM operators. During this period, the company reduced or discontinued television-transmitter activities in order to focus on telecommunications backhaul, network services, and related engineering, installation, and planning capabilities. In the twenty-first century, Siae Microelettronica adapted its business to the transition from circuit-switched networks to IP-based infrastructure. It introduced full-IP and dual-native radio systems supporting Ethernet alongside legacy TDM traffic, as well as adaptive modulation and adaptive bandwidth technologies. These methods allow a link to reduce capacity during adverse conditions such as heavy rain rather than losing service entirely. The company also commercialized dual-polarization and XPIC solutions to increase capacity and frequency reuse without requiring equivalent additional spectrum. The company entered millimeter-wave markets with E-band products in the 2010s and expanded into V-band, small-cell backhaul, and urban non-li…

Siae Microelettronica developed from two related Italian electronics businesses founded by Edoardo Mascetti. After graduating in electrical engineering from the Polytechnic University of Milan in 1949 and gaining professional experience at Siemens, Mascetti established SIAE in 1952. The company initially concentrated on electronic measurement instruments, producing electro-mechanical testers, analog oscilloscopes, telephone analyzers, and signal generators. One SIAE oscilloscope later became associated with the experimental electronic-music equipment of RAI's Studio di fonologia musicale and is preserved in Milan's Castello Sforzesco museum complex. Mascetti co-founded Microelettronica S.p.A. in 1958. Unlike the original measurement-equipment business, Microelettronica focused on radio and landline telecommunications. The two companies merged in 1963, creating Siae Microelettronica S.p.A. and moving the headquarters and manufacturing operation to Cologno Monzese. The merged company had fewer than 50 employees and initially supplied analog multiplexing systems for telephone operators. It also collaborated with ENEL on a communications and supervision system for the electric-power distribution network. That work contributed to later utility-network projects in northern Europe. The 1960s and 1970s saw a broadening of the product range. Siae commercialized multi-channel radio equipment such as the 3-B3 and RT450, produced power-line communication systems, and developed VHF terminals for vehicle communications before the widespread arrival of modern mobile telephony. It also made anti-burglar alarm equipment. In 1973 the company created a television-broadcasting division that supplied repeaters and transmitters, especially to RAI. The transition from vacuum tubes to solid-state technology improved the reliability and compactness of these products. Microwave engineering advanced as well: the RT12, introduced in 1978, used a synthesized direct-conversion modulator at 2.3 GHz and supported substantially more telephone channels than earlier equipment. Siae also built a communications link between Corriere della Sera offices in Milan and Rome. During the 1980s, commercial radio links moved into the digital era. The RT20 used 4-QAM modulation, while the company expanded internationally into Norway, the United Kingdom, and wider Europe. Siae worked with Telettra on the RIAM radio network for ENEL, using microprocessor-controlled equipment. It later delivered 18 GHz systems with capacity of up to 2 Mbit/s and 13 GHz equipment for the British Mercury operator. Higher-frequency production led to specialized thin-film, chip-and-wire, and cleanroom manufacturing capabilities. A major architectural development arrived in 1986 with the split-mount radio. The indoor unit handled network interfaces and baseband processing, while the outdoor unit performed radio-frequency conversion close to the antenna. This arrangement improved deployment flexibility and became a recurring design pattern in later microwave systems. The company's commercial growth during the decade was reflected in European business directories and increasing international activity. The arrival of data services and SDH in the early 1990s pushed Siae toward higher-capacity transport. In 1992 it supplied HS13 SDH equipment to SIP, which later became part of Telecom Italia. The company opened subsidiaries in Latin America and the Far East and developed network-management software that provided a common supervisory interface across radio products. It also entered the cellular infrastructure market with systems aimed at GSM networks. As its telecommunications focus sharpened, Siae ended television-transmitter production and concentrated on microwave backhaul, engineering, network planning, installation, support, and participation in standardization activities. At the end of the 1990s and beginning of the 2000s, Siae responded to the growth of mobile data and packet networking. It developed higher-capacity SDH and multiplexing products, then moved toward Ethernet and full-IP transport as operators migrated away from circuit switching. The company established its first European subsidiary in Paris in 2002 and opened a non-European branch in Bangkok in 2006. Production increasingly adopted automated surface-mount technology to support larger volumes. Siae also worked with Cisco on adaptive bandwidth and adaptive modulation techniques, allowing radio links to continue operating at reduced throughput during rain or other impairments. Subsequent product development focused on spectrum efficiency and network capacity. Full-IP split-mount and full-outdoor radios were joined by dual-native systems supporting both TDM and Ethernet. In 2007, Siae and Vodafone presented work on a 2xSTM-1 frequency-reuse system using cross-polarization interference cancellation, or XPIC. These technologies helped increase throughput without requiring proportionate additional licensed spectrum. By 2011 the company reported annual radio production of approximately 70,000 units, and by the end of 2012 its workforce exceeded 1,000 people across a worldwide branch network. Siae entered the millimeter-wave market with E-band full-outdoor radios in 2013 and added V-band, small-cell-backhaul, and non-line-of-sight urban solutions in 2014. The same period saw investment in network-monitoring software and the creation of SM Optics. The subsidiary assumed optical transport and terrestrial-network-management activities transferred from Alcatel-Lucent, later Nokia, and broadened the group's capabilities beyond radio links. From 2014 to 2016, the company also pursued experimental communications research through its wholly owned Twist-off operation in Padua. Projects examined orbital-angular-momentum techniques for optical and microwave communications, including field testing, antenna concepts, and comparisons with conventional MIMO approaches. Other research included compact dielectric antennas for millimeter-wave equipment, developed with the Polytechnic University of Milan. Siae maintained formal links with academic institutions, joining the University of Pavia's Laurea Magistrale Plus program in 2015 and becoming an institutional partner of the Politecnico di Milano Foundation from 2018. In 2016 it demonstrated Layer 3 VPN services over microwave using software-defined networking. In 2017 it became a Vodafone technology partner for an Italian 5G project, supplying 10 Gbit/s microwave links for base-station interconnection in the Milan area. The company's later direction has therefore combined established radio-transport expertise with optical networking, software control, millimeter-wave access, and 5G infrastructure.

1. 2017Vodafone 5G partnership

   Siae supported Vodafone's Italian 5G trial with high-capacity microwave links connecting base stations in metropolitan Milan.

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2. 2014SM Optics created

   Optical transport and network-management activities transferred from Alcatel-Lucent were organized under the SM Optics subsidiary.

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3. 2013E-band product launch

   Siae introduced full-outdoor millimeter-wave radios for E-band applications.

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4. 2002First European subsidiary opened

   Siae established a subsidiary in Paris as part of its international expansion.

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5. 1992Entry into high-capacity SDH microwave

   The company supplied HS13 SDH equipment to SIP, entering the high-capacity microwave transport segment.

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6. 1986Split-mount radio architecture introduced

   Siae introduced an indoor-unit and outdoor-unit configuration that became an enduring architecture for microwave radio deployments.

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7. 1973Television-broadcasting division created

   The company began designing television transmitters and repeaters, with RAI among its principal customers.

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8. 1963Companies merged

   SIAE and Microelettronica were combined as Siae Microelettronica S.p.A., with operations moved to Cologno Monzese.

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9. 1958Microelettronica established

   Mascetti co-founded Microelettronica S.p.A. to design telecommunications equipment for radio and landline systems.

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10. 1952SIAE founded

    Edoardo Mascetti founded Società Italiana Apparecchiature Elettroniche, initially focusing on electronic measurement instruments.

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A specialist, engineering-led supplier of wireless and optical transport infrastructure for mobile, fixed, utility, and enterprise networks. The brand emphasizes high-capacity connectivity, spectrum efficiency, resilience under changing radio conditions, network integration, and close cooperation with operators, universities, and technology partners.

• Microwave radio systemsWireless backhaul

  Siae's principal product category consists of point-to-point microwave radios for mobile, fixed, utility, and enterprise networks. The range has progressed from analog multi-channel systems to digital SDH, Ethernet, full-IP, dual-native, and high-capacity platforms. Products use split-mount or full-outdoor configurations and may incorporate adaptive modulation, adaptive bandwidth, and XPIC to maintain service and improve spectrum efficiency.

• ALFOplus familyHigh-capacity microwave

  ALFOplus is a family of carrier-grade microwave transport systems designed for demanding backhaul and fronthaul deployments. The range includes high-throughput configurations and was used in Vodafone's Italian 5G experimentation. ALFOplus systems are intended to support operator-grade Ethernet transport, capacity scaling, and resilient radio operation across metropolitan and regional networks.

• E-band and V-band radiosMillimeter-wave access2013

  These high-frequency radio products address short- and medium-range high-capacity connectivity, including small-cell backhaul and dense urban deployments. E-band systems entered the portfolio in 2013, followed by V-band and non-line-of-sight solutions. Their use cases include rapid capacity additions where fiber is unavailable or where licensed lower-frequency spectrum is constrained.

• SM Optics OMSNOptical transport2014

  OMSN, or Optical Multi-Service Node, is part of the optical telecommunications portfolio managed by SM Optics. The product family reflects Siae Microelettronica's expansion from wireless radio transport into fiber-based aggregation and transport systems for terrestrial networks.

• SM Optics TSSOptical transport switching2014

  TSS, or Transport Service Switch, is an optical networking product family transferred into SM Optics during the reorganization of Alcatel-Lucent-related activities. It supports the group's broader proposition in fiber-optic transport and service aggregation.

• Network-management softwareNetwork operations software

  Siae develops software for monitoring, configuring, and evaluating radio and terrestrial transport networks. Its systems provide unified supervision across equipment types, while later platforms added software-defined networking and service-management capabilities such as Layer 3 VPN support over microwave links.

• 2017Support Vodafone's Italian 5G experimentationStrategy

  Mobile operators required high-capacity transport between emerging 5G base stations and aggregation networks.

  What changed. Siae became a Vodafone technology partner and supplied ALFOplus80HDX microwave links for 5G base-station interconnection in metropolitan Milan.

  Aftermath. The project demonstrated the use of high-capacity microwave as part of an early 5G transport architecture.

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• 2014Create SM OpticsM&A

  Siae sought to complement its established microwave business with optical transport and terrestrial network-management capabilities.

  What changed. Activities and product families transferred from Alcatel-Lucent were placed in the dedicated SM Optics subsidiary.

  Aftermath. The group broadened its offering to include fiber-optic transport and optical network technologies.

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• 1990Concentrate on telecommunications backhaulStrategy

  The company had operated in television broadcasting as well as telecommunications, but demand for digital radio backhaul and data transport was increasing.

  What changed. Siae halted television-transmitter and repeater production and focused resources on radio backhaul, network management, and associated services.

  Aftermath. The decision sharpened the company's identity as a specialist supplier of telecommunications transport infrastructure.

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• 1963Merge the measurement and telecommunications businessesStrategy

  SIAE and Microelettronica had complementary capabilities in electronic instrumentation and telecommunications equipment.

  What changed. The two companies were merged into Siae Microelettronica S.p.A. and moved to a larger manufacturing and office site in Cologno Monzese.

  Aftermath. The merger created the corporate platform that developed into the company's modern telecommunications-equipment business.

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• 2017Siae becomes a Vodafone technology partner for 5G

  Siae supported Vodafone's Italian 5G experimentation by providing ALFOplus80HDX microwave links capable of interconnecting 5G base stations in the Milan metropolitan area.

  Other
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• 2016Siae presents software-defined networking services over microwave

  At Mobile World Congress, the company demonstrated Layer 3 VPN services over microwave links using its SM-OS platform and software-defined networking concepts.

  Product launch
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• 2014SM Optics established as an optical-network subsidiary

  Siae Microelettronica transferred optical network-management laboratories and optical transport product families into SM Optics, a dedicated subsidiary focused on fiber-optic telecommunications.

  M&A
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• 2013Siae Microelettronica enters the E-band millimeter-wave market

  The company introduced full-outdoor radio systems operating in the E band, extending its microwave transport portfolio toward higher-frequency, high-capacity links.

  Product launchProduct generation
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• 2010Siae Microelettronica and NEC conclude worldwide patent litigation

  Patent-related proceedings initiated by NEC against Siae Microelettronica in Milan and Munich were resolved through a bilateral agreement under which the parties withdrew the relevant infringement, nullity, and opposition actions pending in multiple jurisdictions.

  Lawsuit
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1. Siae Microelettronica