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alent to $200 per antenna <strong>and</strong> is so much less than the<br />

total uncertainty in the per site costs that we will neglect<br />

it. Table 9-2 shows the estimated costs in small<br />

quantities <strong>of</strong> the receiver components:<br />

I tem<br />

TABLE 9-2<br />

Unit Cost Total Cost<br />

Number/ (thous<strong>and</strong>s (thous<strong>and</strong>s<br />

Site <strong>of</strong> dollars) <strong>of</strong> dollars)<br />

Antenna Feeds 6 10 60<br />

Up-Converters 12 5 60<br />

Maser Amplifier 2 50 1O0<br />

Mixers, IF Amplifier 2 5 10<br />

Phase Shifter, Driver 1 1 I<br />

Cryogenic 20° K 2 12.5 25<br />

Cryogenics 4° K 1 20 20<br />

1-5/8 in. coax cable 300 m 7/m 2<br />

LO distribution units _ 1 2 2<br />

Synthesizer 1 5 5<br />

System Integration 1 15 15<br />

Total 300<br />

With quantity production it is almost certain that the<br />

total receiver system cost could be reduced from<br />

$300,000 to $200,000 or less, but in any event it is<br />

obvious that the receiver cost is a small fraction <strong>of</strong> the<br />

antenna structural cost.<br />

REFERENCES<br />

1. Minnett, H.C.; <strong>and</strong> Thomas, B. Mac A.: Fields in the<br />

Image Space <strong>of</strong> Symmetrical Focusing Reflectors.<br />

Proc. lEE, vol. 115, 1968, pp. 1419-1430.<br />

2. Jeuken, M.E.J.: Experimental Radiation Pattern <strong>of</strong><br />

the Corrugated Conical-Horn Antenna With Small<br />

Flare Angle. Electronics Letters, vol. 5, Oct. 1969.<br />

3. Brunstein, S.A.: A New Wideb<strong>and</strong> Feed Horn With<br />

Equal E- <strong>and</strong> H-Plane Beamwidths <strong>and</strong> Suppressed<br />

Sidelobes. JPL Space Programs Summary 37-58,<br />

vol. 11.<br />

4. Clairicoats, P.J.B.: Analysis <strong>of</strong> Spherical Hybrid<br />

Modes in a Corrugated Conical Horn. Electronics<br />

Letters, vol. 5, no. 9, May 1969, pp. 189-190.<br />

5. Thomas, B. Mac A.: Matching Focal-Region Fields<br />

With Hybrid Modes. IEEE Trans., AP, May 1970.<br />

6. Thomas, B. Mac A.: Prime-Focus One- <strong>and</strong> Two-Hybrid-Mode<br />

Feeds. Electronics Letters, vol. 6, July<br />

1970.<br />

7. Thomas, B. Mac A.: B<strong>and</strong>width Properties <strong>of</strong><br />

Corrugated Conical Horns. Electronics Letters,<br />

vol. 5, Oct. 1969.<br />

8. Potter, P.D.: Application <strong>of</strong> Spherical Wave Theory<br />

to Cassegrainian-Fed Paraboloids. lEE Trans., AP,<br />

Nov. 1967.<br />

9. Siegman, A.E.: Microwave Solid-State Masers.<br />

McGraw-Hill, N.Y., 1964.<br />

10. Manley, J.M.: <strong>and</strong> Rowe, H.E.: Some General<br />

Properties <strong>of</strong> Nonlinear Elements-Part I. General<br />

Energy Relations. Proc. IRE, vol. 44, 1956.<br />

11. Sard, E.; Peyton, P.; <strong>and</strong> Okwitt, S.: IEE Trans. on<br />

Microwave Theory <strong>and</strong> Techniques, vol. MTT-14,<br />

Dec. 1966.<br />

12. Smith, G.: Parametric Sun-Frequency Upconverter.<br />

IEEE Spectrum, Dec. 1969, p. 5.<br />

13. Cutler, L.S.; <strong>and</strong> Vessot, R.F.C.: Present Status <strong>of</strong><br />

Clocks <strong>and</strong> Frequency St<strong>and</strong>ards. NEREM Record,<br />

1968.<br />

14. Baugh, R.A.; <strong>and</strong> Cutler, L.S.: Precision Frequency<br />

Sources. Microwave J., June 1970, pp. 43-55.<br />

15. Barnes, J.A.; Chi, A.R.; Cutler, L.S.; Healey, D.J.;<br />

Leeson, D.B.; McGunigai, T.E.; Muller, J.A., Jr.;<br />

Smith, W.J.; Sydnor, R.L.; Vessot, R.F.C.; <strong>and</strong><br />

Winkler, G.M.R.: Characterization <strong>of</strong> Frequency<br />

Stability. IEEE Trans. on Instrumentation <strong>and</strong><br />

Measurement, vol. IM-20, no. 2, May 1971, pp.<br />

105-120.<br />

16. Barnum, L.J.: A Multioctave Microwave Synthesizer,<br />

Microwave J., Oct. 1970.<br />

17. A Proposal for a Very Large Array Radio Telescope.<br />

Vol. 2, "Systems <strong>Design</strong>," National Radio Astronomy<br />

Observatory, Green Bank, West Virginia, Jan.<br />

1967.<br />

REFERENCES<br />

NOT CITED<br />

A Proposal for a Very Large Array Radio Telescope. Vol.<br />

1, "The VLA Concept," National Radio Astronomy<br />

Observatory, Green Bank, West Virginia, Jan. 1967.<br />

A Proposal for a Very Large Array Radio Telescope.<br />

Vol. 3, National Radio Astronomy Observatory, Green<br />

Bank, West Virginia, Jan. 1969.<br />

Beazell, H.L.: VLA Local Oscillator Distribution Systems-Summary<br />

Report. Report 1RDC-4787-101-68U,<br />

Univ. <strong>of</strong> Virginia, Charlottesville, Aug. 1968.<br />

Cuccia, C.L.; Williams, T.G.: Cobb, P.R.; Small, A.E.;<br />

<strong>and</strong> Rahilly, J.P.: Microwaves, vol. 6, no. 6, June<br />

1967, p. 27.<br />

Davis, R.T.: Microwaves, vol. 10, Apr. 1971, p. 32.<br />

104

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