1
How a Beverage Antenna Works
How a Beverage Antenna Works
DATE: 2014/04/20::
2
Beverage Antenna at K2XT - Part I
Beverage Antenna at K2XT - Part I
DATE: 2011/10/24::
3
540 ft Beverage antenna Vs 1/2 wave inverted Vee  @ 100 ft
540 ft Beverage antenna Vs 1/2 wave inverted Vee @ 100 ft
DATE: 2012/10/17::
4
An Improved Beverage Antenna - Ned Mountain
An Improved Beverage Antenna - Ned Mountain
DATE: 2015/04/20::
5
Random Wire vs Beverage Antenna Shortwave
Random Wire vs Beverage Antenna Shortwave
DATE: 2015/01/03::
6
40m cw and ssb, vertical vs beverage antenna
40m cw and ssb, vertical vs beverage antenna
DATE: 2015/06/14::
7
the power of the beverage antenna
the power of the beverage antenna
DATE: 2012/02/05::
8
Manly Warringah Radio Society - April 2014 Lecture - Beverage Antenna
Manly Warringah Radio Society - April 2014 Lecture - Beverage Antenna
DATE: 2014/04/27::
9
40M VERTICAL VS SHORT BEVERAGE ANTENNA
40M VERTICAL VS SHORT BEVERAGE ANTENNA
DATE: 2015/06/05::
10
40m 1/2 Wave Shortened Beverage Antenna 1
40m 1/2 Wave Shortened Beverage Antenna 1
DATE: 2015/05/04::
11
Reducing noise with beverage antenna
Reducing noise with beverage antenna
DATE: 2012/07/22::
12
Tropical Band DXing with Perseus SDR and 100m Beverage antenna in Southern Scotland
Tropical Band DXing with Perseus SDR and 100m Beverage antenna in Southern Scotland
DATE: 2012/12/21::
13
Beverage antenna vs 2el 40m Yagi
Beverage antenna vs 2el 40m Yagi
DATE: 2012/07/22::
14
Beverage antenna at K2XT - Part 3
Beverage antenna at K2XT - Part 3
DATE: 2011/10/25::
15
Beverage antenna compared to 40m dipole
Beverage antenna compared to 40m dipole
DATE: 2015/04/26::
16
40m 1/2 wave shortened Beverage Antenna 11
40m 1/2 wave shortened Beverage Antenna 11
DATE: 2015/05/04::
17
20M VERTICAL VS SHORT BEVERAGE ANTENNA
20M VERTICAL VS SHORT BEVERAGE ANTENNA
DATE: 2015/06/05::
18
720
720' Beverage Receive Antenna Demo
DATE: 2009/11/24::
19
40m 1/2 wave shortened Beverage Antenna 3
40m 1/2 wave shortened Beverage Antenna 3
DATE: 2015/05/04::
20
Beverage antenna at K2XT - Part 2
Beverage antenna at K2XT - Part 2
DATE: 2011/10/25::
21
40m 1/2 wave shortened Beverage Antenna 5
40m 1/2 wave shortened Beverage Antenna 5
DATE: 2015/05/04::
22
40m 1/2 wave shortened Beverage Antenna 2
40m 1/2 wave shortened Beverage Antenna 2
DATE: 2015/05/04::
23
40m 1/2 wave shortened Beverage Antenna 9
40m 1/2 wave shortened Beverage Antenna 9
DATE: 2015/05/04::
24
RX testing 350m long Beverage antenna vs. 160m delta loop
RX testing 350m long Beverage antenna vs. 160m delta loop
DATE: 2013/12/29::
25
Beverage Antenna comparison with dipole in SZ1A contest station
Beverage Antenna comparison with dipole in SZ1A contest station
DATE: 2014/01/29::
26
Beverage antenna at DX-Antwerps DX-pedition in Walsoorden
Beverage antenna at DX-Antwerps DX-pedition in Walsoorden
DATE: 2011/06/26::
27
Beverage Antenna
Beverage Antenna
DATE: 2015/01/24::
28
Beverage antenna
Beverage antenna
DATE: 2011/11/14::
29
Morning Beverage Antenna - 2 Meters
Morning Beverage Antenna - 2 Meters
DATE: 2013/11/13::
30
300m Beverage antenna front/back attenaution
300m Beverage antenna front/back attenaution
DATE: 2014/12/31::
31
BEVERAGE ANTENNA TEST.
BEVERAGE ANTENNA TEST.
DATE: 2012/02/28::
32
Beverage antenna at Hovet - in the field
Beverage antenna at Hovet - in the field
DATE: 2013/03/25::
33
LU1FKR working on Beverage antenna terminations
LU1FKR working on Beverage antenna terminations
DATE: 2008/10/30::
34
Part 2 of 2, Amateur Extra Lesson 9.2, Practical Antennas
Part 2 of 2, Amateur Extra Lesson 9.2, Practical Antennas
DATE: 2015/04/24::
35
Beverage Transformer Antenna SWR
Beverage Transformer Antenna SWR
DATE: 2009/10/07::
36
Beverage receiving antenna
Beverage receiving antenna
DATE: 2012/07/22::
37
160m beverage antennas test with local AM stations ARRL 160m CW contest 2012
160m beverage antennas test with local AM stations ARRL 160m CW contest 2012
DATE: 2012/12/02::
38
Beverage  test
Beverage test
DATE: 2009/10/24::
39
5915kHz(1/2), 06:44 JST, Jan. 4, 2014 by Biverage Antenna 100M Length
5915kHz(1/2), 06:44 JST, Jan. 4, 2014 by Biverage Antenna 100M Length
DATE: 2014/01/03::
40
Beverage testing
Beverage testing
DATE: 2012/07/22::
41
WFAN 660 on the new Beverage
WFAN 660 on the new Beverage
DATE: 2014/10/01::
42
Antenna Test T2FD Tuned loop WSML Beverage NE
Antenna Test T2FD Tuned loop WSML Beverage NE
DATE: 2011/11/13::
43
Beverage 320meters vs INV VEE
Beverage 320meters vs INV VEE
DATE: 2013/12/20::
44
N2ZN Beverages
N2ZN Beverages
DATE: 2010/11/13::
45
Puntland Radio One from Somalia during the micro-DXpedition
Puntland Radio One from Somalia during the micro-DXpedition
DATE: 2015/04/28::
46
Beverage Take Three
Beverage Take Three
DATE: 2013/03/26::
47
ERIC DOLLARD - Landers Earthquake Data - EP 4
ERIC DOLLARD - Landers Earthquake Data - EP 4
DATE: 2014/01/27::
48
KE0OG
KE0OG's Lesson 6.5 Specialized Antennas for ARRL General Class Ham License
DATE: 2013/03/17::
49
A short story of the very long 350m beverage...
A short story of the very long 350m beverage...
DATE: 2012/05/28::
50
Shortwave DX Wantok Radio Light 7325khz PNG Received In Scotland on Perseus SDR and Beverage Antenna
Shortwave DX Wantok Radio Light 7325khz PNG Received In Scotland on Perseus SDR and Beverage Antenna
DATE: 2013/02/11::
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RESULTS [51 .. 101]
From Wikipedia, the free encyclopedia
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Comparing the shape of the Beverage to other common antennas. Unlike resonant antennas, the Beverage is oriented with its wire element parallel to the direction of the radio waves.

The Beverage antenna is a long wire receiving antenna mainly used in the low frequency and medium frequency radio bands, invented by Harold H. Beverage in 1921. It is used by amateur radio, shortwave listening, and longwave radio DXers and military applications.

A Beverage antenna consists of a horizontal wire one or two wavelengths long (hundreds of feet at HF to several kilometres for longwave) suspended above the ground, with the feedline to the receiver attached to one end and the other terminated through a resistor to ground. The antenna has a unidirectional radiation pattern with the main lobe off the resistor-terminated end, so that end is pointed at the transmitter region. Some Beverage antennas use a two-wire design that allows reception in two directions from a single Beverage antenna. Other designs use sloped ends where the center of the antenna is six to eight feet high and both ends of the antenna gradually slope downwards towards the termination resistor and matching transformer.

The advantages of the Beverage are excellent directivity, and wider bandwidth than resonant antennas. It's disadvantages are its physical size, requiring considerable land area, and inability to rotate to change the direction of reception. Installations often use multiple antennas to provide wide azimuth coverage.


History[edit]

Harold H. Beverage experimented with receiving antennas similar to the Beverage antenna in 1919 at the Otter Cliffs Radio Station.[1][2] By 1921, Beverage long wave receiving antennas up to nine miles (14 km) long had been installed at RCA's Riverhead, New York, Belfast, Maine, Belmar, New Jersey, and Chatham, Massachusetts receiver stations for transatlantic radiotelegraphy traffic. The antenna was patented in 1921 and named for its inventor Harold H. Beverage. Perhaps the largest Beverage antenna—an array of four phased Beverages three miles (5 km) long and two miles (3 km) wide—was built by AT&T in Houlton, Maine for the first transatlantic telephone system opened in 1927.

Technical description[edit]

Animation showing how the antenna works. The electric field of the radio wave (E, big red arrows) is at an angle θ to the vertical, creating a horizontal component parallel to the antenna wire (small red arrows). The horizontal electric field creates a traveling wave of oscillating voltage and current along the wire (I, blue line) which increases in amplitude with distance from the end. When it reaches the driven end (left), the current passes through the transmission line to the receiver. Radio waves in the other direction, toward the terminated end, create traveling waves which are absorbed by the terminating resistor R, so the antenna has a unidirectional pattern.
A Beverage antenna that can be improvised for military field communications, from a U.S. Army field manual. Rather than being grounded, the resistor is attached to a second lower wire which serves as a counterpoise, an artificial ground for the transmitter. The antenna's main lobe, its direction of greatest sensitivity, is to the right, off the end of the wire that is terminated in the resistor.

Harold Beverage discovered in 1920 that an otherwise nearly bidirectional long wire antenna becomes uni-directional by placing it close to the lossy earth and by terminating one end of the wire with a non-inductive resistor with a resistance approximately matched to the surge impedance of the antenna. This is because it functions as a traveling wave antenna; the radio frequency current travels in one direction along the wire, toward the feed end. This also allows it to have a wider bandwidth than resonant antennas such as the dipole or monopole antenna, which act as resonators, with the radio currents traveling in both directions along the element, bouncing back and forth between the ends.

The Beverage antenna relies on "wave tilt" for its directive properties. At low and medium frequencies, a vertically polarized radio frequency electromagnetic wave traveling close to the surface of the earth with finite ground conductivity sustains a loss that produces an electric field component parallel to the Earth's surface. If a wire is placed close to the earth and approximately at a right angle to the wave front, the incident wave generates RF currents traveling along the wire, propagating from the near end of the wire to the far end of the wire. The RF currents traveling along the wire add in phase and amplitude throughout the length of the wire, producing maximum signal strength at the far end of the antenna where a receiver is typically connected. The antenna has a unidirectional reception pattern, because RF signals arriving from the receiver-end of the wire induce currents propagating toward the terminated end, where their energy is absorbed by the terminating resistor.

Radio waves propagate by the ionosphere at medium or high frequencies (MF or HF) typically arrive at the Earth's surface with wave tilts of approximately 5 to 45 degrees. Ionospheric wave tilt allows the directivity inducing mechanism described above to produce excellent directivity in Beverage antennas operated at MF or HF.

While Beverage antennas have excellent directivity, because they are close to lossy earth they do not produce absolute gain (typically -20 to -10 dBi). This is rarely a problem, because the antenna is used at frequencies where there are high levels of atmospheric radio noise. The antenna has a high radiation resistance (200 to 500 ohms) and is rarely utilized for transmitting. The Beverage antenna is a popular receiving antenna because it offers excellent directivity over a broad bandwidth, albeit with relatively large size.

Directivity is a function of the length of the antenna. While directivity begins to develop at a length of only 0.25 wavelength, directivity becomes more significant at one wavelength and improves steadily until the antenna length reaches a length of about two wavelengths. It's generally accepted among Beverage antenna experts that directivity no longer improves when the antenna is longer than two wavelengths. Beverages longer than two wavelengths suffer from the phase incoherency of the incoming waves over distances of several wavelengths, resulting in phase incoherency of the currents induced in the antenna that degrades the directivity of the antenna.

The Beverage antenna is most frequently deployed as a single wire. A dual wire variant is sometimes utilized for rearward null steering or for bidirectional switching. The antenna can also be implemented as an array of two to 128 or more elements in broadside, endfire, and staggered configurations offering significantly improved directivity otherwise very difficult to attain at these frequencies. A four element broadside/staggered Beverage array was used by AT&T at their longwave telephone receiver site in Houlton, Maine. Very large phased Beverage arrays of 64 elements or more have been implemented for receiving antennas for Over-the-horizon radar systems.

Implementation[edit]

A single wire Beverage antenna is typically a single straight copper wire, between one and two wavelengths long, running parallel to the Earth's surface in the direction of the desired signal. The wire is suspended by insulated supports above the ground. A non-inductive resistor approximately equal to the characteristic impedance of the wire, about 400 to 600 ohms, is connected from the far end of the wire to a ground rod. The other end of the wire is connected to the feedline to the receiver.

The driving impedance of the antenna is equal to the characteristic impedance of the wire with respect to ground, somewhere between 400 to 800 ohms, depending on the height of the wire. Typically a length of 50 ohm or 75 ohm coaxial cable would be used for connecting the receiver to the antenna endpoint. A matching transformer should be inserted between any such low-impedance transmission line and the higher 470 ohm impedance of the antenna. A transformer with a turns-ratio of 3:1 would provide an impedance transformation of 9:1 which will match the antenna to a 50 ohm transmission line. A transformer with a turns-ratio of 5:2 would provide an impedance transformation of 6.25:1 which will match the antenna to a 75 ohm transmission line. Alternatively, a parallel wire transmission line (Twin lead) of 600 ohms makes a fairly good match to the antenna.

See also[edit]

Patents[edit]

References[edit]

Antenna Theory and Design By Warren L. Stutzman, Gary A. Thiele, John Wiley & Sons, May 22, 2012

  1. ^ End of an Era: NSGA Winter Harbor to Close Its Doors
  2. ^ Radio NBD, Otter Cliffs, Maine (circa 1917-1919) - from Les Smallwood, CTRCS, USN Retired

External links[edit]

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