Tuning systems on dielectric substrates

A tuning system comprising:

• a dielectric;
• a pair of first and second electrodes confronting each other with said dielectric interposed therebetween, each of said first and second electrodes having at least one bent portion to present primarily a lumped-constant inductance and having a desired equivalent electrical length;
• said first and second electrodes having ground or common terminals located out of mutually confronting positions so that voltage signals induced by mutual induction between the electrodes will be opposite in phase with respect to each other, thereby producing a parasitic distributed-constant capacitance due to a potential difference between the electrodes and a dielectric constant of the dielectric;
• one of said first and second electrodes having a first terminal at a desired position thereof, the electrodes forming a two-terminal circuit network having the first terminal with the ground or common terminals serving as a second terminal, the two-terminal circuit network forming an equivalent parallel resonant circuit composed of a lumped-constant inductance formed by said one electrode and a parasitic distributed-constant capacitance between the first and second electrodes;
• and
• an amplifier connected at its output terminal to said first terminal of said equivalent parallel resonant circuit for generating a tuning amplifying action to produce a selective tuning amplified signal.

A tuning system comprising:

• a dielectric;
• a pair of first and second electrodes confronting each other with said dielectric interposed therebetween, each of said first and second electrodes having at least one bent portion to present primarily a lumped-constant inductance and having a desired equivalent electrical length;
• said first and second electrodes having ground or common terminals located out of mutually confronting positions so that voltage signals induced by mutual induction between the electrodes will be opposite in phase with respect to each other, thereby producing a parasitic distributed-constant capacitance due to a potential difference between the electrodes and a dielectric constant of the dielectric;
• one of said first and second electrodes having a first terminal at a desired position thereof, the electrodes forming a two-terminal circuit network having the first terminal with the ground or common terminals serving as a second terminal, the two-terminal circuit network forming an equivalent parallel resonant circuit composed of a lumped-constant inductance formed by said one electrode and a parasitic distributed-constant capacitance between the first and second electrodes;
• and
• a mixer connected at its mixing output terminal to said first terminal of said equivalent parallel resonant circuit and responsive to frequency signals to be mixed for generating a frequency converting action to produce an intermediate-frequency tuning signal.

A superheterodyne tuning system comprising:

• a tuning oscillator circuit for producing a tuning oscillating signal;
• a selective tuning amplifier circuit for amplifying a received signal to obtain a selective tuning amplified signal;
• a mixer circuit for mixing said selective tuning amplified signal and said tuning oscillating signal thereby to obtain an intermediate frequency signal;
• and
• an equivalent parallel resonant circuit comprising:
• a dielectric;
• and
• a pair of first and second electrodes confronting each other with said dielectric interposed therebetween, each of said first and second electrodes having at least one bent portion to present primarily a lumped-constant inductance and having a desired equivalent electrical length;
• said first and second electrodes having ground or common terminals located out of mutually confronting positions so that voltage signals induced by mutual induction between the electrodes will be opposite in phase with respect to each other, thereby producing a parasitic distributed-constant capacitance due to a potential difference between the electrodes and a dielectric constant of the dielectric;
• one of said first and second electrodes having a first terminal at a desired position thereof, the electrodes forming a two-terminal circuit network having the first terminal with the ground or common terminals serving as a second terminal, the two-terminal circuit network forming said equivalent parallel resonant circuit composed of a lumped-constant inductance formed by said one electrode and a parasitic distributed-constant capacitance between the first and second electrodes;
• wherein at least one of an oscillation output terminal of said tuning oscillator circuit, an amplifying output terminal of said selective tuning amplifier circuit and a mixing output terminal of said mixer circuit is connected to said first terminal of said equivalent parallel resonant circuit.

A superheterodyne tuning system comprising:

• a tuning oscillator circuit for producing a tuning oscillating signal;
• a selective tuning amplifier circuit for amplifying a received signal to obtain a selective tuning amplified signal;
• a mixer circuit for mixing said selective tuning amplified signal and said tuning oscillating signal thereby to obtain an intermediate frequency signal;
• and
• two or more equivalent parallel circuits each comprising:
• a dielectric;
• and
• a pair of first and second electrodes confronting each other with said dielectric interposed therebetween, each of said first and second electrodes having at least one bent portion to present primarily a lumped-constant inductance and having a desired equivalent electrical length;
• said first and second electrodes having ground or common terminals located out of mutually confronting positions so that voltage signals induced by mutual induction between the electrodes will be opposite in phase with respect to each other, thereby producing a parasitic distributed-constant capacitance due to a potential difference between the electrodes and a dielectric constant of the dielectric;
• one of said first and second electrodes having a first terminal at a desired position thereof, the electrodes forming a two-terminal circuit network having the first terminal with the ground or common terminals serving as a second terminal, the two-terminal circuit network forming each of said equivalent parallel resonant circuits composed of a lumped-constant inductance formed by said one electrode and a parasitic distributed-constant capacitance between the first and second electrodes;
• wherein two or more of an oscillation output terminal of said tuning oscillator circuit, an amplifying output terminal of said selective tuning amplifier circuit and a mixing output terminal of said mixer circuit are respectively connected to said two or more equivalent parallel resonant circuits, each through said first terminal, said two or more equivalent parallel resonant circuits sharing a same dielectric body as said dielectric.