SIST EN 301 215-2 V1.3.1:2003

SIST EN 301 215-2 V1.3.1:2003 is the Slovenian adoption of ETSI EN 301 215-2 V1.3.1, published by SIST. It specifies the essential electrical requirements for linear-polarized, fixed-beam antennas used with point-to-multipoint fixed radio systems, mainly for terminal station and central station applications in the 24 GHz to 30 GHz band.

What does SIST EN 301 215-2 V1.3.1:2003 specify?

SIST EN 301 215-2 V1.3.1:2003 sets antenna performance limits that support frequency coordination for point-to-multipoint fixed radio systems. It is part 2 of a multi-part ETSI deliverable, and it works together with EN 301 215-1 for the 24 GHz to 30 GHz range.

The scope focuses on essential electrical requirements for new point-to-multipoint systems using linear polarization and fixed beams. Electronically steerable antennas and circularly polarized antennas are outside the scope, which matters if you are selecting hardware for adaptive beam steering or circular polarization.

The document is organized around one main technical clause on electrical characteristics and an informative bibliography.

The foreword also places this part in a larger series:

• Part 1 - General aspects
• Part 2 - 24 GHz to 30 GHz
• Part 3 - Multipoint Multimedia Wireless system in 40.5 GHz to 43.5 GHz
• Part 4 - Multipoint Multimedia Wireless system in 30 GHz to 40.5 GHz

What are the key requirements of SIST EN 301 215-2 V1.3.1:2003?

SIST EN 301 215-2 V1.3.1:2003 defines class-based antenna patterns and minimum gain levels for terminal station and central station antennas. In practice, it tells designers and suppliers what antenna radiation behavior and gain they must meet for deployment in the 24 GHz to 30 GHz band.

Terminal station antennas

Clause 4.1 applies the radiation pattern envelope (RPE) and gain parameters to both horizontal and vertical linearly polarized antennas. The terminal station classes TS1, TS2 and TS3 are defined by co-polar and cross-polar azimuth and elevation pattern envelopes. This is the main check for how tightly the antenna energy is directed, which affects interference control and link planning.

Clause 4.1.2 sets the minimum terminal station boresight gain by gain category. The scope highlights a reduction in gain category 1 from 26 dBi to 22 dBi, while gain category 2 remains defined separately. For users, this means the selected antenna must meet the declared gain class before it can be matched to the radio link budget.

Central station antennas

Clause 4.2 defines central station sectored antennas through three classes, CS1, CS2 and CS3. The sector angle is declared by the supplier, and the pattern templates apply across the full 24 GHz to 30 GHz range. This matters because the antenna has to cover the intended sector without radiating excessively outside it.

Clause 4.2.2 links minimum boresight gain to the declared sector angle. In practice, you must check both the sector width and the gain target together, because wider sectors are allowed different gain behavior than narrow ones.

Clause 4.4 gives a symmetric elevation RPE for central station antennas and explains how electrical tilt and mechanical tilt are handled. This is important for real site installation, where the antenna may need tilt to cover terrain and cell geometry while still respecting the declared pattern.

General antenna conditions

Clause 4.3 notes that no omni-directional central station antennas have been identified in this part. Clause 4.5 requires both terminal station and central station antennas to radiate a linearly polarized wave. Clause 4.6 states that, if a radome is used, the antenna must still meet the required gain and radiation pattern with the radome fitted.

What terms does SIST EN 301 215-2 V1.3.1:2003 define?

SIST EN 301 215-2 V1.3.1:2003 uses the definitions, symbols and abbreviations from EN 301 215-1. The most important terms in this part are those that describe antenna role and pattern behavior.

• Point-to-Multipoint (P-MP) - a network arrangement where one central site serves multiple terminals.
• Terminal Station (TS) - the remote station antenna used at the edge of the point-to-multipoint system.
• Central Station (CS) - the hub-side antenna that serves the sector or coverage area.
• Radiation Pattern Envelope (RPE) - the allowed limit for antenna radiation at different angles.
• Boresight gain - the gain in the main pointing direction, used to judge link strength.
• Co-polar - the pattern component with the intended polarization.
• Cross-polar - the pattern component with the orthogonal polarization.
• Radome - the protective cover placed over an antenna that can affect its measured performance.

Who uses SIST EN 301 215-2 V1.3.1:2003?

SIST EN 301 215-2 V1.3.1:2003 is used by antenna manufacturers, fixed radio system designers, network operators, test laboratories, and regulatory or conformity-assessment teams. They use it to specify antenna performance, choose suitable products, verify declared patterns and gain, and check whether a design fits coordinated spectrum use in the 24 GHz to 30 GHz band.

Which standards are used with SIST EN 301 215-2 V1.3.1:2003?

SIST EN 301 215-2 V1.3.1:2003 refers to three related ETSI standards.

• EN 301 213-1 - gives the basic parameters for point-to-multipoint digital radio systems in the 24.25 GHz to 29.5 GHz range.
• EN 300 833 - gives minimum requirements for point-to-point antennas used when high-gain point-to-multipoint antennas follow point-to-point performance practice.
• EN 301 215-1 - provides the general aspects, definitions, classification, and framework for the series.

What does the SIST EN 301 215-2 V1.3.1:2003 document contain?

SIST EN 301 215-2 V1.3.1:2003 contains class-based antenna templates, gain limits, and pattern envelopes for terminal station and central station use. Clause 4 includes figures and tables for TS radiation patterns, TS boresight gain, CS azimuth templates, CS sector gain, CS elevation pattern, polarization, and radome conditions.

The document is structured for design and conformance checking rather than for protocol operation. Its graphical limits and class definitions help users compare an antenna design or test result against the required pattern shape and gain behavior.