Claims
- 1. A two port impedance matching device having an input port adapted to be connected to a source of excitation and an output port adapted to be connected to a load impedance Z.sub.L, said source having a frequency in the RF region, said impedance matching device presenting to said source a desired characteristic impedance Z.sub.0 so that when power is made available at the source, the power is substantially absorbed by said load impedance Z.sub.L, said power being made available over a wide frequency band having a center frequency f, said frequency band extending from f/4 to 4f, and having a lower frequency band extending from f/4 to f and a higher frequency band extending from f to 4f, said impedance matching device comprising:
- (a) a predetermined number n of first planar inductive components associated with said lower frequency band, each first planar inductive component comprising primary windings, each first planar inductive component having an input end thereof and an output end thereof, and each first planar inductive component having a first unique individual characteristic impedance, each of said primary windings arranged in a spiral path having a center, each of said primary windings disposed in a reference plane, said first planar inductive components being connected in series, the output end of one first planar inductive component being connected to the input end of an adjacent first planar inductive component, said first planar inductive components being arranged into a first group having an initial planar inductive component with the input end thereof comprising an initial end of said first group connected to said input port and a final planar inductive component with the output end comprising a final end of said first group connected to said output port;
- (b) a predetermined number m of second planar inductive components associated with said higher frequency band, each second planar inductive component comprising secondary windings, each second planar inductive component having an input end thereof and an output end thereof, and each second planar inductive component having a second unique individual characteristic impedance, each of said secondary windings arranged in a spiral path having a center, each of said secondary windings disposed in a reference plane, said second planar inductive components being connected in series, the output end of one second planar inductive component being connected to the input end of an adjacent second planar inductive component, said second planar inductive component being arranged into a second group having an initial planar inductive component with the input end thereof comprising an initial end of said second group electrically coupled to said input port and a final planar inductive component with the output end thereof comprising a final end of said second group electrically coupled to said output port, said first and second inductive components being arranged in corresponding pairs with each respective primary and secondary winding of each corresponding pair being arranged relative to one another so as to be overlapping and facing one another and so as to have mirror-image symmetry across each other's said reference planes, each pair of said mirror-symmetry arranged first and second planar inductive components being separated from each other by non-conductive spacer means and being magnetically and capacitively coupled to each other; and
- (c) a predetermined number p of switch means, each switch means being responsive to an externally generated signal and characterized by a high impedance state and a low impedance state, each of said switch means being rendered conductive in response to said externally generated signal for causing the switch means to attain its low impedance state, each of said switch means being connected across the input and output ends of a corresponding second planar inductive component in a manner that when the switch means attains its low impedance state, said switch means shorts out the corresponding said second planar inductive component connected thereto and also effectively shorts out the corresponding first planar inductive component of the mirror-symmetry arranged pair.
- 2. A two port impedance matching device according to claim 1, wherein a predetermined number p of semiconductor devices comprises said p switch means, and wherein when power is made available at said source it has high power levels exceeding 1 Kw and produces high voltage transients in excess of 10 Kv and high current transients as high as 20 amperes, said first and second planar components being coupled to each other and comprising means for transferring said power of such source when made available and having high power levels exceeding 1 Kw to said load so as to reduce the high voltage and high current transients that might otherwise occur when said semiconductor devices are being responsive to said externally generated signal.
- 3. A two port impedance matching circuit arrangement according to claim 1, wherein said respective first and second planar inductive components are segmented and separated from each other into a predetermined number of sets, said sets being located in a grounded enclosure, each set of said first planar inductive components being situated on one planar surface comprising one substrate and each set of said second planar inductive components being situated on another planar surface comprising another substrate, said one substrate and said another substrate being separated by said non-conductive spacer means, said enclosed sets serving as a stripline impedance matching device.
- 4. A two port impedance matching circuit according to claim 1, wherein said p switch means includes an initial entry switch means and a final exit switch means, said initial entry switch means serially connected between said input port and each of said initial ends of said first and second groups of first and second planar inductive components, and said final exit switch means serially connected between said output port and said final end of said first and second groups of first and second planar inductive components.
- 5. A circuit arrangement for impedance matching having an input port adapted to be connected to a source of excitation and an output port adapted to be connected to a load impedance Z.sub.L, said source having a frequency in the RF region, said impedance matching circuit presenting to said source a predetermined impedance when said source is active and providing excitation signals over a wide frequency band having a center frequency f, said frequency band extending from f/4 to 4f and having a lower frequency band extending form f/4 to f and a higher frequency band extending from f to 4f, said circuit arrangement comprising:
- (a) a predetermined number n of first planar inductive components each comprising primary windings, each first planar inductive component having an input end thereof and an output end thereof, and each first planar inductive component having a first unique individual characteristic impedance, each of said primary windings arranged in a spiral path having a center, each of said primary windings disposed in a reference plane, said first planar inductive components being connected in series, the output end of one first planar inductive component being connected to the input end of an adjacent first planar inductive component, said first planar inductive components being arranged into a first group having an initial planar inductive component with the input end thereof comprising an initial end of said first group connected to said input port and a final planar inductive component with the output end thereof comprising a final end of said first group connected to said output port;
- (b) a predetermined number m of second planar inductive components each comprising secondary windings, each second planar inductive component having an input end thereof and an output end thereof, and each secondary inductive planar component having a second unique individual characteristic impedance, each of said secondary windings arranged in a spiral path having a center, each of said secondary windings disposed in a reference plane, said second planar inductive components being connected in series, the output end of one second planar inductive component being connected to the input end of an adjacent second planar inductive component, said second planar inductive components being arranged into a second group having an initial planar inductive component with an input first end thereof comprising an initial end of said second group connected to said input port and a final planar inductive component with the output end thereof comprising a final end of said second group connected to said output port, said first and second inductive components being arranged in corresponding pairs with each respective primary and secondary winding of each corresponding pair being arranged relative to one another so as to be overlapping and facing one another and so as to have mirror-image symmetry across each other's said reference planes, each pair of said mirror-symmetry arranged first and second planar inductive components being separated from each other by non-conductive spacer means and being magnetically and capacitively coupled to each other; and
- (c) a predetermined number p of switch means, each switch means being responsive to an externally generated signal and characterized by a high and a low impedance state, each of said switch means being rendered conductive in response to said externally generated signal for causing the switch means to attain its low impedance state, each switch means being connected across the input and output ends of a corresponding second planar inductive component in a manner that when the switch means attains its low impedance state, said switch means selectively shorts out said corresponding second planar inductive components connected thereto while at the same time said corresponding switch means also effectively shorts out the corresponding first planar inductive components of the mirror symmetry arranged pairs;
- (d) wherein said arrangement of said first planar inductive components provides a controllable impedance transformation at said lower frequency band and said arrangement of second planar inductive components provides a controllable impedance transformation at said higher frequency band in response to the state of the switch means, said switch means being switched to the low impedance state in response to said externally generated signal.
- 6. An impedance matching circuit adapted to be connected between a source of excitation and a load impedance Z.sub.L impedance, said source having a frequency in the RF region, said impedance matching circuit presenting to said source a desired characteristic impedance Z.sub.0 so that power made available from said source is substantially absorbed by said load impedance Z.sub.L, said power being made available over a wide frequency band having a center frequency f, said frequency band extending from f/4 to 4f, and having a lower frequency band extending form f/4 to f and a higher frequency band extending from f to 4f, said impedance matching circuit comprising a plurality of two port devices connected in cascade between said source and said load impedance Z.sub.L, each of said two port devices comprising:
- (a) a predetermined number n of first planar inductive components associated with said lower frequency band, each first planar inductive component comprising primary windings, each first planar inductive component having an input end thereof and an output end thereof, and each first planar inductive component having a first unique individual characteristic impedance, each of said primary windings arranged in a spiral path having a center, each of said primary windings disposed in a reference plane, said first planar inductive components being connected in series, the output end of one first planar inductive component being connected to the input end of an adjacent first planar inductive component;
- (i) said first planar inductive components of said plurality of two port devices being arranged into a first group having an initial planar inductive component with the input end thereof comprising an initial end of said plurality of two port devices connected to said service and a final planar inductive component with the output end thereof comprising a final end of said plurality of two port devices connected to said load impedance Z.sub.L ;
- (b) a predetermined number m of second planar inductive components associated with said higher frequency band, each second planar inductive component secondary windings, each second planar inductive component having an input end thereof and an output end thereof, and each second planar inductive component having a second unique individual characteristic impedance, each of said secondary windings arranged in a spiral path having a center, each of said secondary windings disposed in a reference plane, said second planar inductive components being connected in series, the output end of one second planar inductive component being connected to the input end of an adjacent second planar inductive component,
- (i) said second planar inductive components of said plurality of two port devices being arranged into a second group having an initial planar inductive component with the input end thereof comprising an initial end of said plurality of two port devices connected to said source and a final planar inductive component with the output end comprising a final end of said plurality of two port devices connected to said load impedance Z.sub.L ;
- said first and second inductive components being arranged in corresponding pairs with each respective primary and secondary winding of each corresponding pair being arranged relative to one another across each other's said reference planes so as to be overlapping and facing one another and so as to have mirror-image symmetry, each pair of said mirror-symmetry arranged first and second planar inductive components being separated from each other by non-conductive spacer means and being magnetically and capacitively coupled to each other; and
- (c) a predetermined number p of switch means, each switch means being responsive to an externally generated signal and characterized by a high impedance state and a low impedance state, each of said switch means being rendered conductive in response to said externally generated signal for causing the switch means to attain the low impedance state, each of said switch means being connected across the input and output ends of a corresponding second planar inductive component in a manner that when the switch means attains its low impedance state, said switch means shorts out the corresponding said second planar inductive component connected thereto and also effectively shorts out the corresponding first planar inductive component of the mirror-symmetry arranged pair.
Parent Case Info
This is a continuation of parent application, Ser. No. 07/680,220 filed on Apr. 4, 1991, now abandoned.
US Referenced Citations (9)
Foreign Referenced Citations (1)
Number |
Date |
Country |
318310 |
Dec 1989 |
JPX |
Non-Patent Literature Citations (3)
Entry |
Technical Proposal 18839.0000, of AEL Defense Corp., entitled "Frequency Agile Solid-State Power Amplifer," dated Nov. 1988. |
Technical Proposal 18542.0001, of AEL Defense Corp., entitled "Frequency Agile HF Antenna Coupler," dated Nov. 1989. |
Technical Proposal 18121.0002, of AEL Defense Corp., entitled "Frequency-Agile HF Antenna," dated Jul. 1990. |
Continuations (1)
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Number |
Date |
Country |
Parent |
680220 |
Apr 1991 |
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