Three dimensional reconfigurable photoconductive antenna array element
First Claim
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1. A microwave radiating photoconductive antenna component comprising:
- (a) a plurality of optically excitable microwave radiating semiconductor members;
(b) first voltage application means for applying sufficient voltage to a first microwave radiating semiconductor member to cause said first semiconductor member to radiate microwave radiation in response to the receipt of a light beam having a first wavelength related to the bandgap of the material of said first semiconductor member;
(c) second voltage application means for applying sufficient voltage to a second microwave radiating semiconductor member to cause said second microwave radiating semiconductor member to radiate microwave radiation in response to the receipt of a light beam having a second wavelength, different from said first-wavelength, and related to the bandgap of the material of said second semiconductor member; and
(d) light beam generator means for directing light of said first wavelength at said first, semiconductor member and light having said second wavelength at said second semiconductor member to enable both semiconductor members to radiate microwave energy upon the application of said voltage thereto.
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Abstract
First and second tandemly positioned electrically biased semiconductor members radiate microwave energy in response to the receipt of an excitation light beam having two wavelengths related to the bandgaps of the members. The projected microwave beam may be made more narrow and directional if two of the members are electrically biased at the same time. An inefficient frequency doubler generates the two wavelength beam enabling a single light beam to excite both members in a simple, rugged photoconductive antenna element.
4 Citations
20 Claims
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1. A microwave radiating photoconductive antenna component comprising:
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(a) a plurality of optically excitable microwave radiating semiconductor members; (b) first voltage application means for applying sufficient voltage to a first microwave radiating semiconductor member to cause said first semiconductor member to radiate microwave radiation in response to the receipt of a light beam having a first wavelength related to the bandgap of the material of said first semiconductor member; (c) second voltage application means for applying sufficient voltage to a second microwave radiating semiconductor member to cause said second microwave radiating semiconductor member to radiate microwave radiation in response to the receipt of a light beam having a second wavelength, different from said first-wavelength, and related to the bandgap of the material of said second semiconductor member; and (d) light beam generator means for directing light of said first wavelength at said first, semiconductor member and light having said second wavelength at said second semiconductor member to enable both semiconductor members to radiate microwave energy upon the application of said voltage thereto. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A microwave radiating photoconductive antenna component comprising:
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(a) a plurality of tandemly positioned optically excitable microwave radiating semiconductor members; (b) first voltage application means for selectively applying sufficient voltage to a first microwave radiating semiconductor member to cause said first semiconductor member to radiate microwave radiation in response to the receipt of a light beam having a first wavelength related to the bandgap of the material of said first semiconductor member; (c) second voltage application means for selectively applying sufficient voltage to a seqond microwave radiating semiconductor member to cause said second microwave radiating semiconductor member to radiate microwave radiation in response to the receipt of a light beam having a second wavelength, different from said first wavelength, and related to the bandgap of the material of said second semiconductor member; and (d) light beam generator means for directing light of said first wavelength at said first semiconductor member and light having said second wavelength at said second semiconductor member to enable both semiconductor members to radiate microwave energy upon the application of said voltage thereto. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification