It can also be constructed in resonance with the radar wavelength. The larger a corner reflector is, the more energy is reflected. The single areas of the corner reflector should be large compared to the radar wavelength. Thus, even small objects with small RCS yield a sufficiently strong echo. Incoming electromagnetic waves are backscattered by multiple reflection accurately in that direction from which they come. Figure 2: Reflection on two surfaces standing perpendicular to each otherĪ particularly strong radar echo from objects that would otherwise have only very low effectiveĪ corner reflector consisting of two or three electrically conductive surfaces which are mounted crosswise (at an angle of exactly 90 degrees). DÍMF Control and program m I riß, hong 3N0i i me-out timers. rpceater sya terr Key features ottfieHRC. Spectrum Electronic Prod* ucis introduces the wnr'd's handheld iepeBtE' cor Vol si No j-ger nan rr.o^r haraheioradk^ lheHHC-10 cor verts a stngte or duaf-sand r^tfo cnto a tufl featured src en or d.if. In addition to ail of these benefits, the folks al Arrow Antenna Handheld RepeaterController The Corner Beam lets you operate across the em ire ham band with an SWR of less than 1.2:1- virtually flat. As an example, a typical standard beam will have a 2 to 4 MHz bandwidth with an SWR ofiess than 2:1. And fourth, a corner reflector has much wider bandwidth than a beam. signal from a transmitter toward a gnen geographic area. Third, the 40 dB front-to-back ratio makes it ideal for nulling out interference from other stations, or for concentrating all of the. Second, ihe directivity is the same or better than a Yagj-Uda with the same gain. The Corner Beam's longest element is four feet long, making it ideal for mounting and rotating in a smaller space. So what does a corner reflector have that a piain old Yagi-Uda doesn't^ First, it's much shorter A standard beam antenna with the same 10 dB gaiii as the Corner Beam would have to be 10 feel long. however, a high gain 2 m or 70 cm antenna is most effectively btnli using corner reflector methods, Building a parabolic dish at VHK frequencies can be a trick> maneuver. The screen was (hen formed into a right angie (or a 60 or a 45 angle) to improve the front-to-back ratio, which created the corner reflector If the reflector i.s rotated in a lull circle around the single driven element you gel a parabolic dish antenna. The single reflector was turned into a screcn for a greater back-side rejection. which utilized directors and a reflector. The ordinary dipole ga\e waj to the Yagi-Uda. In the overall scheme of things, comer reflectors have a spot in the logi-cai progression of antenna evolution. The best of'both worlds, the Comer Beam stagger* f -HF reflectors with longer \ HF reflectors. Colorado.Ī few davs later, as soon as I slid the antenna out of the package I had a thought: "You know, these guys might be telling the truth!"īefore going into details, it might be a good idea to review the reasoning behind getting a corner reflector in the first Photo I. Consider the Arrow Antenna motto: "Simply the Best/' Or maybe the description of the ( orner Beam: This is an impressive antenna, no matter how you look al Or even the relatively humble "Arrow Antennas manufactures a very selcel line of products." Well, 1 thought, there's no shortage of hubris in Loveland. I received the product literature for the Arrow Antenna 146/435 Corner Beam antenna well before I got ihe actual antenna, Glancing over the spec sheets, Iįound quite a few phrases thai got my attention. some products come along described in Such glowing terms by their makers that it's hard to keep an open mind when review ing the product As an example. Of course people tend to exaggerate when they're talking about their oun products-this is expected, and you learn to filter out the facts from the hyperbole- Si ill. Larry Antonuk WB9RRT Box 452 Marlborough NH 03455Īfter years and years of doing prod uei reviews, you tend 10 get fairly immune to boastful claims from various manufacturers. Big dual band signals are just around the cornet:
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