JP3175779B2 - Glass antenna - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a glass antenna using an antenna pattern of a conductor on a glass surface.

[0002]

2. Description of the Related Art FIG. 7 shows a conventional glass antenna. (1
18) is the rear glass of the car, (119) is the antenna pattern of the conductor, and (120) is the defogger pattern. In the defogger pattern, an electrode terminal formed on a side end of a glass surface is connected to a power supply through a cable (123), coils (124) and (125), and a capacitance (1) is connected between a power supply _VDD and a ground GND.
26) is connected. In the antenna pattern, similarly, the signal terminal at the side end of the glass surface is connected to a booster amplifier (121) provided near the rear glass, and an output signal X is output from the booster amplifier through a cable (122). The power supply V _PP and the ground GND are also supplied to the booster amplifier by cables.

FIG. 8 shows a configuration of a conventional booster amplifier. The signal input to the input terminal I is amplified by the amplifier (131) in the AM band and by the amplifier (139) in the FM band, and is combined to extract the output signal X. (129) and (130) are bias resistors of the AM band amplifier, and (137) and (138) are bias resistors of the FM band amplifier. The series connection of the capacitance (127) and the coil (128) is an input filter for passing the AM band component of the signal I to the amplifier, and the coil (136) is connected between the intermediate terminal of the series connection of the capacitances (134) and (135) and the ground. ) Input filter is FM
Pass the band components through an amplifier (139). The output of the amplifier in the AM band passes through an output filter comprising a series connection of a capacitor (132) and a coil (133), and the amplifier output in the FM band is a capacitor (140).
And output to one terminal through an output filter, and becomes an output signal X. The power supply filter is composed of the coil (142) for guiding the power supply V _PP and the stabilizing capacitance (141).

[0004]

In this conventional glass antenna, the lead from the signal terminal of the antenna pattern to the booster amplifier is long, and if the routing changes, the sensitivity is reduced or fluctuated. If a signal is to be obtained from a plurality of antenna patterns, there have been problems such as the connection of signal lead wires and the configuration of the booster amplifier becoming complicated.

[0005]

SUMMARY OF THE INVENTION The present invention provides a booster
Amplifier (5) having a horizontal stripe portion and AM band signal
Pattern for receiving signals and FM band signals (2)
And whether it extends vertically to the horizontal stripes
Antenna pattern to receive more than one FM band
(4) is installed on the glass (1) surface of the car window.
Booster amplifier (5) is an amplifier, FM band frequency
Filter, input line from antenna pattern (2)
(A) and input line (C) from antenna pattern (4)
Wherein the amplifier comprises a transistor connected in parallel
(91) and a transistor (98).
The filter is connected between the input line (A) and the transistor (91).
Capacitance (87) and capacitance (88) connected between base
And a capacitor (87) and a capacitor (88)
Coil (89) connected between the intermediate connection point of
The filter further comprises an input line (C) and a
Capacitance connected to the base of the Lancaster (98)
Series connection circuit of (94) and capacitance (95), and capacitance
Between the intermediate connection point of (94) and the capacitance (95) and the ground
A gas generator comprising a coil (96) to be connected.
That provides Las antenna. Also, booster amplifier
(5) a signal having an AM band having a horizontal stripe portion;
An antenna pattern (2) for receiving an FM band signal and
F extends vertically to the horizontal stripe portion and
Antenna pattern (4) for receiving frequencies above M band
It is installed on the glass (1) surface of the car window,
The star amplifier (5) is an amplifier and a filter for the frequency in the FM band.
Filter, FM band or higher frequency filter, antenna pattern
Line (A) from antenna (2) and antenna pattern
The input line (C) from (4), and the amplifier
A resistor (107) is connected between the
Transistor (108), the frequency of the FM band
The number of filters consists of the input line (A) and the transistor (1).
08) and the coil (10)
3) the series connection of the capacity (104) and the capacity (105)
Path and intermediate connection between capacity (104) and capacity (105)
A coil (106) connected between the point and ground,
The filter of the frequency above the FM band is input line (C)
And the base of the transistor (108)
The series connection of the capacitor (113) and the capacitor (114)
Path and intermediate connection between capacity (113) and capacity (114)
Comprising a coil (115) connected between the point and ground
A glass antenna is provided.

When signals from a plurality of antenna patterns are combined by an input filter, an input from one antenna pattern is connected to an input from another antenna pattern through a filter using a coil and / or a capacitor. Or through a filter according to the signal type of each antenna pattern. The input filter includes filters for signals in the AM band and signals in frequencies higher than the FM band, or a plurality of filters in the same band.

The amplifier has a load of a coil and / or a resistor between an output side of a transistor for amplifying a signal and a power supply, and extracts an output signal directly from an output point of the transistor or through a follower. . When combining with an amplifier, transistors are connected in parallel with a common load, a signal from an antenna pattern is input to each transistor via a filter, and combined with a transistor amplifier circuit.

FIG. 1 is a configuration diagram of the glass antenna of the present invention. (1) is a glass, (2) is an antenna pattern having a horizontal stripe pattern made of a conductor, AM band
(0.5 to 1.6 MHz) and FM band (76 to 90 MHz) signals, and (3) is a horizontal stripe defogger pattern with A
(4) is an antenna pattern extending in the vertical direction, which also serves as an antenna pattern for the M band, and receives frequencies above the FM band.

Signals from the antenna patterns (2), (3) and (4) on the glass surface are passed through input lines A, B and C, respectively, and a booster amplifier (5) arranged on the same surface.
Input, and combine and amplify with a booster amplifier.
The output signal X is extracted through (6). Cable (6)
It consists of a coaxial cable whose output signal line shield is grounded to GND and a power supply line for supplying the power supply V _{PP of the} booster amplifier.

The electrode defogger pattern (3) arranged in a U-shape on the glass surface has a power supply V _DD and a ground G through a choke coil (8), (9) and a cable (7) from the side end.
ND is supplied. (10) is a stabilizing capacity of the power supply .
Ji Yokukoiru (8), (9) and capacitor (10) is mounted in the vicinity of an automobile rear glass (1) is mounted. Choke coil (8), defogger pattern (3) and (9), the frequency of the AM band, the power supply V _DD, Yes in the characteristic impedance from the GND is high, the antenna pattern also serves as a de fogging guard pattern (3) Receives an AM band signal. To the booster amplifier (5), the signal input of the antenna pattern or we which also serves as a defogger pattern (3), if the defogger pattern (3) was 1 and the horizontal reversal of the pattern,
An input line similar to B can be made from the point indicated by D.

FIG. 2 is a reference circuit diagram of a booster amplifier used in the glass antenna of the present invention. The signal on the input line B in FIG. 1 is filtered by a coil (11) and a capacitor (12), a signal in the AM band is passed, and a signal in the FM band is blocked. 1
3), the signal component of the FM band is passed through an input filter of the FM band connecting the coil (15) between the intermediate terminal of the series connection of (14) and the ground, and the signal component of the FM band is connected to one of the double-gate field effect transistors (18). A is guided to the gate and passed through an AM band input filter composed of a series connection of a capacitor (23), a coil (24), and a resistor (25).
The signal component of the M band is led to the base of the transistor (27). The gate bias of the transistor (18) is obtained by dividing the power supply with resistors (16) and (17), and the transistor (27)
Is biased by connecting a resistor (26) between the collector and the base.

The source of the transistor (18) is connected in parallel with a resistor (19) and a capacitor (20) between the source and the ground.
The emitter of (27) is grounded. Transistor (1
The drain of (8) is connected to the collector of the transistor (27), and a resistor (21) and a coil (22) are connected in series as a load between the drain and the power supply. The signals of the FM band and the AM band input to the transistor (18) and the transistor (27) are shared by the load (21) and (22), respectively.
And the transistor (27) are connected in parallel, and are synthesized and amplified by this amplifier.

The output points of the transistors (18) and (27) are connected to a resistor (29) between the emitter and the ground, and the emitter-follower transistor having a collector connected to a power supply.
The output signal X is connected to the base of (28), and the output signal X is extracted from the emitter follower through the capacitor (30). Resistance (25)
Is the combined impedance with the coil (24), which is used to limit the base current component of the AC signal and adjust the signal gain of the amplifier.The coil (22) is used to obtain an FM band amplified signal. Choosing impedance. The amplified signal in the FM band at the connection point between the resistor (21) and the coil (22) is converted into a DC signal for controlling a transistor through an automatic gain control circuit including elements (31) to (41). It is input to the other gate of the heavy gate field effect transistor (18). The feedback controls the gain of the signal in the FM band.

From the connection point between the resistor (21) and the coil (22),
The signal input via (31) is amplified by (32) to (34), and (3)
It is rectified by 5) to (38) and inverted and amplified by (39) to (41) to create a DC signal for control. The emitter of the transistor (33) is connected to the ground, the collector is connected to the resistor (34) between the power supply, the base is connected to the resistor (32) between the collector and the bias, and the signal is inputted from (31).

The output of the transistor (33) becomes a signal at the bias point of the diode (36) through the capacitor (35), and is rectified by the diode (37) and the capacitor (38).
It becomes the base potential of 9). The emitter of the transistor (39) is connected to the ground, the collector is connected to the resistor (40) between the power supply and the collector, and the potential is stabilized by the capacitance (41). If the amplitude of the input signal to the capacitor (31) is large, it is rectified and the transistor
The current flowing into the base of the transistor (39) is large, the voltage between the resistors (40) is large, and the voltage between the gate and the source of the transistor (18) is lowered to lower the gain. The resistor (44) connected to the power supply V _PP is used to lower the power supply voltage due to the voltage drop due to the current flowing in the circuit, and the coil (43),
A power supply filter is constituted with the capacity (42).

[0016]

The glass antenna of the present invention combines signals from a plurality of antenna patterns with an input filter or amplifier of a booster amplifier, and reduces the number of elements by sharing the elements constituting the amplifier. Since the amplifier is miniaturized and mounted on the same glass surface, fluctuations due to lead wires are eliminated, and a stable signal output can be obtained. Since signals from a plurality of antenna patterns are combined and amplified by one booster amplifier and output from one terminal, the configuration of the glass antenna is simple and high performance is achieved.

[0017]

FIG. 3 is a second reference circuit diagram of a booster amplifier used in the glass antenna of the present invention. FIG.
At the input line A passes through the FM band filter composed of the elements (45) to (48) and enters the base of one of the two transistors (50) connected in series. It enters the base of the transistor (59) through an AM band filter composed of the elements (54) to (57).

The filter in the FM band has a resistance (45) and a capacitance (4
6) and (47) are connected in series, and a coil (48) is connected between the intermediate terminal of the capacitors (46) and (47) and the ground. The AM band filter is composed of a coil (54) and a capacitor (55). , A resistor (56) are connected in series, and a capacitor (57) is connected between the coil (54) and the capacitor (55) and the resistor (56). The coil (48) cooperates with the capacitor (46) to attenuate the AM band signal component, and the capacitor (57) cooperates with the coil (54) to attenuate the FM band signal component. The resistance (45) between the input lines of A and B and the bases of the transistors (50) and (59)
(56) adjusts the impedance to the base,
Used to properly set the gain of the signal in the AM band.

(49) and (58) are transistors (5
0) and (59) are resistors for base bias, and the series-connected transistors (50) and (51) and the transistor (59) share a resistor (52) and a coil (53). As loads, input signals from A and B are amplified and combined. (6
0) to (62) correspond to FIGS. 2 (28) to (30), and output signals are extracted from the emitter follower. Resistance (52) and coil
The signal at the connection point of (53) enters the automatic gain control circuit (63),
Its output is a transistor that amplifies the signal in the FM band (5
0) enters the base of the transistor (51) connected in series, to control the gain of the FM band signal. A Zener diode (65) connected in series to the supply line of the power supply V _PP together with the coil (66) is used to reduce the power supply voltage by the Zener voltage, and (64) is a stabilizing capacitance.

FIG. 4 is a third reference circuit diagram of a booster amplifier used in the glass antenna of the present invention. The signal on the input line B in FIG.
After blocking the signal in the M band, the filter of the coil (67) combines the signal with the signal on the input line A, and after passing the combined signal through the coil (68), removes the signal component in the unnecessary frequency band (69). )
And (78)-(81)
And re-synthesized through the AM band filter of the element (3) and placed in the base of the transistor (73). In the FM band filter, the capacitances (69) and (70) are connected in series, and the capacitances (69) and (7)
The coil (71) is connected between the intermediate terminal of (0) and the ground, and the AM band filter is connected in series with the capacity (78), the coil (79), and the resistor (80), and the coil (79) and the resistor (80) The capacitor (81) is connected between the connection point of (1) and the ground.

The emitter of the transistor (73) is grounded,
Connect the coil (74) and resistor (75) between the collector and the power supply regulated by the elements (82) to (86), and connect the bias resistor (72) between the base and collector. ing. The coil (68) and the resistor (80) adjust the impedance of the FM band and the AM band signals to the base of the transistor (73), respectively, and amplify the amplified signal appearing on the load of the coil (74) and the resistor (75). Set the gain.

The output signal X is directly extracted from the amplifier through the capacitor (76). The capacitance (77) connected between the connection point between the coil (74) and the resistor (75) and the ground is used to improve the frequency characteristics of the gain of the amplifier. The regulator connects the collector of the transistor (83) to the power supply V _PP via the coil (86), and the base divides and biases the power supply and ground between the power supply and the ground with the resistor (85) and the Zener diode (84), and connects the base to the emitter. It is configured with a stabilizing capacity (82). Since the base is biased by the Zener voltage and output by the emitter follower, the power supply is Zener voltage-base,
Regulated to emitter-to-emitter voltage.

FIG. 5 shows a first embodiment of the booster amplifier used in the glass antenna of the present invention. The signals of the input lines A and C in FIG. 1 are respectively (87) to (89) and (94)
Through the filter in the FM band by the elements of (96) to the base of the transistors (91) and (98) connected in parallel,
The common load is amplified by an amplifier having a resistor (92) and a coil (93), and an output signal X is extracted through a capacitor (99). F
The filters in the M band are each connected in series (8
The coils (89) and (96) are connected between the intermediate connection points of (7) and (88) and (94) and (95) and the ground. Transistors (91), (9
The resistances (90) and (97) between the base and collector in 8) are for bias, and the capacitance (100) between the connection point of the load resistance (92) and the coil (93) and the ground is in the FM band. Used to improve amplifier gain. Coil (102) connected to power supply VPP
And the capacity (101) is a power filter. Figure 1 shows (2),
The signals of the horizontal and vertical antenna patterns shown in (4) are combined and amplified to increase the reception sensitivity of the glass antenna.

FIG. 6 shows a second embodiment of the booster amplifier used in the glass antenna of the present invention. Input line A
And C signals are respectively converted by the elements (103) to (106) into F
The signal is synthesized through a filter in the M band and a filter having a frequency equal to or higher than the frequency in the FM band by the elements (113) to (115), and put into the base of the transistor (108). Transistor (10
8) The emitter is grounded and the collector is a coil (109)
And (110) are connected in series, and a bias resistor (107) is connected between the base and the collector.

The filters in the FM band have capacities (104) and (10).
5) and the coil (103) are connected in series, and the coil (106) is connected between the intermediate terminal of the capacitors (104) and (105) and the ground. A coil (115) is connected between the intermediate terminal of the series connection of (114) and the ground.
The coil (103) is a transistor (10
8) Adjust the impedance to the base of the coil (109) and the capacitance between the middle terminal of the coil (110) and the ground (112).
Are used to adjust the frequency characteristics of the signal gain of the amplifier.

The output signal X is extracted from the amplifier via the capacitor (111). Coil connected to power supply V _PP (117)
And the capacity (116) is a power filter. A signal in the FM band or more, for example, a frequency band of a television is input from C, and the coil (110) is used as a main load in the FM band, and the coil (10) is used in the TV band.
9) The load is shifted to.

[0027]

According to the glass antenna of the present invention, signals from a plurality of antenna patterns are combined by an input filter or amplifier of a booster amplifier arranged on the same glass surface and output from one terminal. The signal from the antenna pattern is simply processed to improve the reliability and the reception characteristics.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a glass antenna of the present invention.

FIG. 2 is a reference circuit diagram of a booster amplifier used for the glass antenna of the present invention.

FIG. 3 is a second reference circuit diagram of a booster amplifier used for the glass antenna of the present invention.

FIG. 4 is a third reference circuit diagram of a booster amplifier used for the glass antenna of the present invention.

FIG. 5 is a circuit diagram of a first embodiment of a booster amplifier used for the glass antenna of the present invention.

FIG. 6 is a circuit diagram of a second embodiment of the booster amplifier used for the glass antenna of the present invention.

FIG. 7 is a configuration diagram of a conventional glass antenna.

FIG. 8 is a circuit diagram of a conventional booster amplifier.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Glass 2 Antenna pattern 3 Defogger pattern and antenna pattern 4 Antenna pattern 5 Booster amplifier 6 Antenna cable 7 Defogger cable 8 Choke coil 9 Choke coil 10 Capacity

Continued on the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) H01Q 1/32 H01Q 21/24 H04B 1/18 H04B 7/08

Claims (2)

(57) [Claims] 1. Booster amplifier (5), horizontal stripe
Part and receive AM band signal and FM band signal
Antenna pattern (2) and the horizontal stripe portion
Extends in the vertical direction and receives frequencies above the FM band
Antenna pattern (4) is the window glass of the car
(1) The booster amplifier (5) is provided on the surface, and an amplifier and a frequency band of the FM band are provided.
Filter, input line (A) from antenna pattern (2)
And input line (C) from antenna pattern (4)
For example, the transistor the amplifier, which are connected in parallel (9
1) and a transistor (98), and the filter includes an input line (A) and a transistor (9).
Capacitance (87) connected to the base of 1) and capacity
A series connection circuit with (88), and a capacity (87) and a capacity
A coil connected between the intermediate connection point with (88) and ground.
(89), and the filter further comprises an input line (C) and a transistor.
(94) connected to the base of the monitor (98)
And a series connection circuit of a capacitor (95) and a capacitor (94)
Connected between the intermediate connection point with the capacitor (95) and the ground
Glass antenna characterized by comprising a coil (96)
Na. (2) Booster amplifier (5), horizontal stripe
Part and receive AM band signal and FM band signal
Antenna pattern (2) and the horizontal stripe portion
Extends in the vertical direction and receives frequencies above the FM band
Antenna pattern (4) is the window glass of the car
(1) It is provided on the surface, The booster amplifier (5) is an amplifier and a frequency band for the FM band.
Filters, filters for frequencies above the FM band, antennas
Input line (A) from pattern (2) and antenna pattern
(C) from the input line (4), The amplifier has a resistor (10) between the collector and the base.
7) has a transistor (108) connected to it.
e, The FM band frequency filter is connected to the input line (A)
Runge Star (108 ) Connected between the base
Coil (103), capacity (104) and capacity (105)
Series connection circuit, and capacity (104) and capacity (105)
The coil (10) connected between the intermediate connection point of
6) The filter of the frequency above the FM band is input line (C)
And the base of the transistor (108)
The series connection of the capacitor (113) and the capacitor (114)
Path and intermediate connection between capacity (113) and capacity (114)
Comprising a coil (115) connected between the point and ground
A glass antenna, characterized in that: