A mobile antenna horizontalplane pattern figure 12. Db224e 8150 mhz 6 db 4bay dipole omni base station. There are other antenna manufacturers that make plenty of 4bay dipole antennas. This arrangement avoids the differing coverage patterns that. Buxcomm, agents, or employees, are not responsible for errors or ommissions. Commscopeandrew db222e andrew base station antennas. Introduction an antenna is an electrical conductor or system of conductors otransmission radiates electromagnetic energy into space oreception collects electromagnetic energy from space in twoway communication, the same.
Db224a omni, exposed dipole antenna, 150160 mhz, 360 horizontal beamwidth, fixed electrical tilt lbroad response ltwopiece mast for ease of shipping electrical specifications frequency band, mhz 150160 gain, dbi 8. The ability of an antenna to focus electromagnetic energy is defined by its gain. Db224 a omni exposed dipole antenna, 150160 mhz, 360 horizontal beamwidth, fixed electrical tilt lbroad response ltwopiece mast for ease of shipping electrical specifications frequency band, mhz 150160. The antenna is a four stack collinear array designed to provide. Db222a 150158 mhz 3 db 2bay dipole omni base station. The hertz antenna is an antenna with an electrical length of a half wavelength at its resonant frequency. The andrew solutions db5001 antenna side mount kit is for mounting andrew antennas db222, db224, db264, db314, and db315. It is suitable for mounting to the top or on the side of a tower. The receive antenna is a celwave phelpsdodge station master unit mounted below and horizontally away from the transmit antenna. Ant150f2omnidirectional collinear antenna 148174mhz. A harness with n male connection is included along with the db3650s pipe mount kit for 1. Db224e omni exposed dipole antenna, 8150 mhz, commscope. Antenna basics white paper this white paper describes the basic functionality of antennas.
Broad response 10 mhz bandwidth provides optimum performance in single or multifrequency systems, on both transmit and receive circular patterndb224 has four elements positioned evenly, every 90 degrees around the mast, for omni pattern. Cornerreflector antennas light bar mounted on the roof ahead of the antenna. Broad response bandwidth allows antenna to perform efficiently on both transmit and receive. Db 224 data sheet andrew free download as pdf file. Power patterns for an arbitrary antenna 2 the maximum sidelobe level sll is often of concern to antenna designers, particularly if the antenna was designed to focus power in a speci c direction, since sidelobes essentially represent a. The side mount kit bracket will hold antenna 20 inches away from the tower with 3 inch diameter legs. It can be fed at the low impedance point at the centre as a half wave dipole or fed at the high impedance point at either end. Andrew db224 a 150 160 mhz omni exposed dipole antenna. Commscopeandrew db224b andrew omni exposed dipole antenna.
The bandwidth permits the antenna to perform efficiently on both transmit and receive frequencies. Spacing from feedpoint to feedpoint of each dipole. Clamps for top mounting are supplied with the antenna. Product image of commscope db224c 164174 mhz 6 db 4bay. Get more information about smart antenna pdf free download by visiting this link.
Leading supplier of wireless communications infrastructure and mobile products. Looking over the db220, db222 and db224 element document, everything from 1 up to 174 mhz pretty much use the formula below for the elements. Ant150f2 radiates an omnidirectional propagation pattern with moderate gain and wide vertical beamwidth. This time, at 145 mhz i ran 25 watts into the antenna and got about 1. Talley stocks a wide variety of infrastructure products. There is also the db224s split version of the db224. Omni, exposed dipole antenna, 8150 mhz, 360 horizontal beamwidth, fixed electrical tilt lbroad response ltwopiece mast for ease of shipping db224e electrical specifications frequency band, mhz 8150 beamwidth, horizontal, degrees 360 gain, dbi 8. A vhfuhf dualband jpole searching for an inexpensive, highperformance dualband base antenna for vhf and uhf. The success of the three previous editions of practical antenna handbook has been most gratifying. Decibel products dipole antennas db224e decibel products. If the db224 has a known issue with water, replace the antenna with one that will stand up to the elements and skip building a new phasing harness this will reduce the risk of further problems down the road. Db224e datasheet, cross reference, circuit and application notes in pdf format.
Base station antenna systems 2008 product selection guide. Commscope andrew solutions db224b omni, exposed dipole antenna, 155165 mhz, 360 horizontal beamwidth, fixed electrical tilt. I have many early db224 s by early, i mean mid1970s models all the way up to current models, as in 2016. I have many early db224s by early, i mean mid1970s models all the way up to current models, as in 2016. Omni coverage and a gain of 6 db can be achieved through a circular pattern.
Optional radiation pattern the radiation pattern of the db224 can be easily changed from a 6 dbd gain omnidirectional pattern, to a 9 dbd maximum gain. This antenna mounting kit features galvanized steel construction and stainless steel hardware. In radio and telecommunications a dipole antenna or doublet is the simplest and most widely used class of antenna. Through the use of a suitable duplexer, a single db222 and transmission line can be used for simultaneous transmission and reception when used in duplex or mobile repeater operations. The antenna was then taken down and modified as shown below, then put back up, and the same test run. Commscope offers an extensive line of base station antennas designed to help improve network capacity, with solutions supporting densification, increased efficiency, and new spectrum adds.
This adjustable field omni antenna has a maximum power input of 500 watts. D db222, db224, db228, and db264 antennas perform efficiently in both. This popular antenna is available with four folded dipoles for high gain and broad bandwidth. Universal db222a repeater antenna discount twoway radio. Jun 05, 2006 there is also the db224s split version of the db224. Wisco international decibel products dipoles db220. This item is normally stocked in our distribution facility. Db224 omni mounted on side of tower db224e elements pointed toward the tower db224e elements pointed away from the tower d b 2 2 4 d b 2 2 4 e db224 ve r tical pattern model. The transmit antenna is a comspec decibel products db224 e, 4 bay folded dipole unit. Figure 2this eznec plot shows the difference in the radiation patterns between a vertical halfwave radiator operated at its fundamental. Antenna gain relative to a dipole antenna can be expressed in decibels as dbd.
They confirmed that the types of people who buy the book meet the profile above. It was with surprise and delight that i noted that clerks in one radio. The end fed half wave antenna is a classic hf antenna. If the phasing harness is toast, replace the antenna with something like. Broad responsebandwidth allows antenna to perform efficiently on both transmit and receive flexible array available with dipoles aligned collinearly for an offset pattern or with dipoles on the opposite sides of the mast for a circular pattern. After completing this tutorial, you will be able to calculate the parameters of an antenna and decide which antenna suits for which type of. Antenna characteristics page 3 a 3d power pattern b 2d power pattern in rectilinear format figure 5. Broad response 10 mhz bandwidth provides optimum performance in single or multifrequency systems, on both transmit and receive.
Pdf db222 db264 db404 db4 db224 db268 db408 db420 db228 db304 decibel products db4 sp 8635 decibel products dipole. Andrew db224a 150 160 mhz omni exposed dipole antenna. Customer and technical support, training, softwarefirmware, repair services. A smart antenna consists of several antenna elements, whose signal are processed adaptively in order to exploit the spatial domain of the mobile radio channel. The newer models have molded endoftheline terminations where the old models probably mid1980s were just taped up with black tape. Sector sculpting using multibeam or narrowbeam antennas. The dipole is any one of a class of antennas producing a radiation pattern approximating that of an elementary electric dipole with a radiating structure supporting a line current so energized that the current has only one node at each end. The transmit antenna is a comspec decibel products db224e, 4 bay folded dipole unit. Request a quote sell to us andrew omni exposed dipole antenna, 155165 mhz, 360 horizontal beamwidth, fixed electrical tilt. End fed antenna operating manual cross country wireless. Use of information contained in each file is at your own risk. When antenna manufacturers specify simply the gain of an antenna they are usually referring to the maximum value of g. This popular antenna is available with two folded dipoles, db222, or with a single folded dipole, db220.
The receiving properties of antennas are characterized by the antenna affective area af,t,i, where the available power at the output of the receiving antenna prf is the product of the effective area of the receiving antenna in direction t,i and the flux density swm2hz1 incident from that direction. For the harness, measure from the tip of the feedline connector to the center of the first 3way splice, then compare it to dimension d of your db304 pdf file. This split antenna system connects to a wacom wp639 bpbr 4 cavity duplexer. Thus, the antenna increases its length for the surface wave which leads to the improvement of the antenna gain and directivity. Thus, an antenna with a gain of 3 dbd would have a gain of 5. Starting with hertzs antenna model followed by a short introduction to the fundamentals of wave propagation, the important general characteristics of an antenna and its associated parameters are explained. Shabbir hasan,ece827,ist,national antenna parameters are.
Db222 series db264 series db404 series db4 series db224. May 17, 2014 if the db224 has a known issue with water, replace the antenna with one that will stand up to the elements and skip building a new phasing harness this will reduce the risk of further problems down the road. May 19, 2015 looking over the db220, db222 and db224 element document, everything from 1 up to 174 mhz pretty much use the formula below for the elements. Db980 db8945 decibel products db225 antenna db874h db884h asp712 asp2015 asp685 db205. Hydrolynx satellite data concentrator stations are complete packaged gauges which receive alert radio data, buffer the data, and transmit it via low earth orbiting satellites providing an alternate data path to a terrestrial radio repeater system. Flexible array available with dipoles aligned collinearly for an offset pattern or with dipoles on the opposite sides of the mast for a circular. Typii a v s w r c jrve db224ejj base station antenna this lightweight antenna has a 5 mhz. Electrical design the antenna is a four stack collinear array designed to pro. Some are built much heavier, both electrically and mechanically. About the tutorial this tutorial is meant to provide the readers a detailed description of the antennas used in communication systems. Db224e omni exposed dipole antenna, 8150 mhz, 360 horizontal beamwidth, fixed electrical tilt, mfr.
Antenna gain is expressed as a ra tio of the effective radiated output power pout to the input power pin the gain of an antenna is a measure of power transmitted relative. Db224 a product specification comprehensive product support. The telewave ant150f2omnidirectional collinear antenna 148174mhz, is an extremely rugged collinear antenna. Clerks in radio stores told me that this book was outselling other titles 2. Commscope andrew solutions db224 b omni, exposed dipole antenna, 155165 mhz, 360 horizontal beamwidth, fixed electrical tilt. Dual ve r s i o n two antennas on the same mast are fed and operated separately, p roviding 3 db omni or 6. It consists of two independent antennas on the same mast. It is factory adjusted and checked for minimum vswr over a wide band of frequencies. Commscope andrew solutions db224e omni, exposed dipole antenna, 8150 mhz, 360 horizontal beamwidth, fixed electrical tilt.
That assumption proved to be correct as i have received letters from a wide variety of people. The db224 is a heavy duty, light weight, high gain antenna. Isotropic antenna idealized oradiates power equally in all directions dipole antennas ohalfwave dipole antenna or hertz antenna oquarterwave vertical antenna or marconi antenna parabolic reflective antenna oused for terrestrial microwave and satellite applications olarger the diameter, the more tightly directional is the beam. Db 224 data sheet andrew antenna radio bandwidth signal. The db224 mast is twopiece addresses steves comment on shipping length. Omni, exposed dipole antenna, 164174 mhz, 360 horizontal beamwidth, fixed. Andrew wireless solutions is composed of two groupsantenna, cable and.
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