Summary of Contents for ADVENTCED ANTENNAS LPD-100M1G
- Page 1 TECHNICAL MANUAL FOR Advanced Antennas LPD – 100M1G Log Periodic Antenna 100 - 1100 MHz ADVANCED ANTENNAS 10401 Roselle Street San Diego, CA 92121 (800) 404-2832...
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Page 2: Table Of Contents
TABLE OF CONTENTS Page SECTION 1. GENERAL DESCRIPTION ................3 SECTION 2. TECHNICAL SPECIFICATIONS ..............6 2.1. Electrical Specifications ....................6 2.2. Mechanical Specifications ....................7 2.3. Typical Data ........................8 SECTION 3. THEORY ......................11 3.1. General ...........................11 3.2. Field Measurement ......................12 SECTION 4. -
Page 3: General Description
For a typical antenna factor curve, see Figure 2-3. The LPD-100M1G is capable of handling a substantial amount of power for use with a transmitter. The amount of CW power that can be applied is limited primarily by heating in the cable, is higher at the low frequencies than at the high end of the band. - Page 4 Figure 1-1 The LPD-100M1G (Vertical Polarization) Advanced Antennas 10401 Roselle Street Phone: (800) 404-2832 San Diego, CA 92121 Page 4 of 20...
- Page 5 Figure 1-2 The LPD-100M1G (Optional Polarization U-Joint Detail) Advanced Antennas 10401 Roselle Street Phone: (800) 404-2832 San Diego, CA 92121 Page 5 of 20...
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Page 6: Technical Specifications
SECTION 2. TECHNICAL SPECIFICATIONS 2.1. Electrical Specifications Frequency Range: 100 MHz to 1.1 GHz. Output Impedance: 50 Ohms Nominal. VSWR: 2.0: 1 Typical (see Figure 2-1). Gain: 6 dBi Typical (see Figure 2-2). Radiation Pattern: Unidirectional beam off tip of antenna, in E and H Planes. 3 dB Beam width: E-Plane: 75°. -
Page 7: Mechanical Specifications
2.2. Mechanical Specifications Antenna Dimensions (Maximum): Length: 60” (152 cm). Width: 60” (152 cm). Height (without mast): 5” (13 cm). Height (with mast): 25” (64 cm). Weight: 7.6 lbs. (3.5 kg). Mounting: One ¼-20 hole on mast base. Universal Joint (Optional): Delrin, with slide-handle type screws for firm, easy locking in any position. -
Page 8: Typical Data
2.3. Typical Data Figure 2-1 LPD-100M1G Typical VSWR Plot Advanced Antennas 10401 Roselle Street Phone: (800) 404-2832 San Diego, CA 92121 Page 8 of 20... - Page 9 Figure 2-2 LPD-100M1G Typical Gain Plot Advanced Antennas 10401 Roselle Street Phone: (800) 404-2832 San Diego, CA 92121 Page 9 of 20...
- Page 10 Figure 2-3 LPD-100M1G Typical AFE Plot Advanced Antennas 10401 Roselle Street Phone: (800) 404-2832 San Diego, CA 92121 Page 10 of 20...
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Page 11: Theory
THEORY 3.1. General The LPD-100M1G is a backward traveling wave structure. It has a unidirectional beam pattern with its maximum gain off the tip of the structure in the direction of the boom axis. Such antennas act as directional traveling-wave couplers, which require quasi-plane traveling wave field conditions in order to respond according to specifications in a receiving application. -
Page 12: Field Measurement
3.2. Field Measurement The Power gain G, relative to an isotropic antenna, and the E-Field antenna factor AFE are related AFE (dB/m) = 20*log f - G (dBi) - 29.78 (Equation 3-1) where f is frequency in MHz. The E-field antenna factor AFE for a directional antenna is defined as the ratio of the field intensity E (volts/meter) of an incident plane traveling wave, to the output voltage V of the antenna across a specified terminating resistance, when the antenna beam is... -
Page 13: Assembly & Setup
SECTION 4. ASSEMBLY & SETUP 4.1. Antenna Assembly 1. Lay out the three boom sections with the cable and connector mount at the top of the assembly (see Figure 4-1 & 4-2). Fit the three sections of the boom together. Do not press the cable into place unless the booms are securely fastened together. - Page 14 Figure 4-1 LPD-100M1G Assembly Figure 4-2 LPD-100M1G Connector Detail Advanced Antennas 10401 Roselle Street Phone: (800) 404-2832 San Diego, CA 92121 Page 14 of 20...
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Page 15: Setup
Figure 4-3 LPD-100M1G Boom Joint & Cable Grommet Details 4.2. Setup Mount the LPD-100M1G using the provided ¼-20 hole on the bottom of the mast. Connect the RF output of the antenna (Type N Female; see Figure 4-2) to the receiver or test equipment using an appropriate coaxial cable. -
Page 16: Maintenance & Troubleshooting
SECTION 5. MAINTENANCE & TROUBLESHOOTING 5.1. General Maintenance The design of the LPD-100M1G antenna is such that little or no maintenance is required under normal usage. Physical damage to the structure (bent elements, etc.) should be repaired prior to placing the antenna in service. It should be clean, especially at the nose of the boom. -
Page 17: Maintenance Service Requests
5.3. Maintenance Service Requests Repair as indicated or return to factory for service. Address requests for replacement parts or service to: ADVANCED ANTENNAS 10401 Roselle Street San Diego, CA 92121 (800) 404-2832 Advanced Antennas 10401 Roselle Street Phone: (800) 404-2832 San Diego, CA 92121 Page 17 of 20... -
Page 18: Replaceable Parts List
30692-3 FEED END ASSY 21228 LPD MAST ADAPTER 30698 OPTIONAL UNIVERSAL-JOINT ASSEMBLY 21234-2 MAST, 17.50” 21265 MAST BASE Table 6-1 LPD-100M1G Replaceable Parts List Advanced Antennas 10401 Roselle Street Phone: (800) 404-2832 San Diego, CA 92121 Page 18 of 20... - Page 19 ELEMENT, LPD-100M1G, 3.515 21255-27 ELEMENT, LPD-100M1G, 3.092 21255-28 ELEMENT, LPD-100M1G, 2.724 21255-29 ELEMENT, LPD-100M1G, 2.404 21255-30 ELEMENT, LPD-100M1G, 2.125 Table 6-2 LPD-100M1G Replaceable Elements List Advanced Antennas 10401 Roselle Street Phone: (800) 404-2832 San Diego, CA 92121 Page 19 of 20...
- Page 20 WARRANTY All equipment manufactured by Advanced Antennas is warranted against defects in materials and workmanship for a period of one year from the date of shipment. Advanced Antennas will repair or replace any defective item or material if notified within the warranty period. You will not be charged for warranty services performed at our factory.
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