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David White
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Catalog > Antennas > FM Antennas > 1105 Series

1105 Series Circularly Polarized FM Antenna

Characteristics

Product Line:1105 Series
Frequency Range:88 - 108 MHz
Multiplexed Versions Available:No
Broadband Applications:No
Polarization:Circular
Azimuth:± 2 dB in free space
VSWR at Input:1.50:1 ± 2 MHz
Maximum Power Rating:12 kW

The 1105 Series Antenna meets the requirements of Class “A” facilities. The 1105-B, with power handling capabilities up to 12 kW, meets the requirements of all Class “A” and some higher facilities. Designed to withstand wind velocities to 150 mph, the 1105, with low weight and wind load parameters, is ideally suited for mounting on lightweight structures. Standard dc to ground continuity is an asset in reducing the damaging effects of lightning. The power split is 50/50, with other ratios available. Electrical beam tilt and null fill are optional on the 1105-B Series. Contact ERI for special power split gains.

Features/Benefits

  • Circular polarization
  • Light weight and low wind load design
  • Custom modifications are available
  • Corrosion resistant construction
  • Beam tilt and/or null fill available
  • Stainless steel support brackets and hardware
  • Custom designed antenna supports; poles or LAMBDA™
  • Antenna Structures are also available from ERI

Ordering Information

Type Number Definition  

1105 - a b  
Number of Bays 
Power Handling: Blank = Medium Power | B = High Power 
Example:  1105-12B 
Description:  ERI Model 1105 FM Antenna, twelve bay, high power 

Options*

  • Beam tilt (center fed antennas only)
  • First null fill (center fed antennas only)
  • Export packing

Note: Except where noted options available at additional cost.

Mounting Information

Utilize the ERI Advantage

Combine an ERI antenna with an ERI Mounting Structure, Pattern Measurement and Installation. Assure yourself of the best antenna/tower interaction. ERI’s Pattern Measurement service will provide the crucial answers concerning the relationship between the antenna mounting orientation and antenna pattern.

ERI Mounting Sections are designed to achieve optimum antenna performance while reducing weight and wind loads. Only ERI can offer you an antenna/tower/installation package that will achieve your highest expectations in a demanding FM market. Contact Electronics Research for complete electrical and mechanical specifications.

Related Publications

1105 Series Circularly Polarized FM Radio Antenna

1105 Series Circularly Polarized FM Radio Antenna Brochure > Download File

Topics Include: Antennas

(Type: Brochure; Publication Number: 20090317004_AEN; Language Code: EN; Revision: 02)


Type Number Number of
Bays
Power Gain,
Numeric | dB
Bay Spacing,
Wave Lengths
Power Rating, kW
12
6.8781 numeric | 8.3747 dB
1
12
11
6.2783 numeric | 7.9784 dB
1
12
10
5.68 numeric | 7.5435 dB
1
12
9
5.0826 numeric | 7.0609 dB
1
12
8
4.4872 numeric | 6.5198 dB
1
12
7
3.8935 numeric | 5.9034 dB
1
12
6
3.3025 numeric | 5.1884 dB
1
12
5
2.7154 numeric | 4.3383 dB
1
12
5
2.7154 numeric | 4.3383 dB
1
9
4
2.1332 numeric | 3.2903 dB
1
12
4
2.1332 numeric | 3.2903 dB
1
9
3
1.5588 numeric | 1.9279 dB
1
9
3
1.5588 numeric | 1.9279 dB
1
9
2
0.9971 numeric | -0.0126 dB
1
6
2
0.9971 numeric | -0.0126 dB
1
6
1
0.4611 numeric | -3.3620 dB
1
3
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