JPH04505237A - Paging receiver with continuously tuned antenna and RF amplifier - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Paging receiver technology with continuously tuned antenna and RF amplifier The present invention provides a method for transmitting data from channels within at least one wireless common carrier frequency band. The present invention relates to an RF paging receiver for receiving radio waves. More specifically, the present invention has a dynamically programmable channel of reception from at least one frequency band. The present invention relates to a paging receiver of the type described above.

Background technology U.S. Patent No. 4,851,830 describes the authorization paging used in the world today. VHF and UHF bands (149-16 2,278-290 and 449-462MHz) Continuously tuned app with programmable channel for receiving pages from Janel A paging receiver with an antenna is disclosed. Disclosed in the aforementioned patent application A tuned antenna is used to receive channels within the multiple frequency bands mentioned above. broadband is required. The paging receiver disclosed in the aforementioned patent The channel received is within the broadcast range of the local paging service transmitter. Accommodates the transportation of paging receivers to remote areas outside of the enclosure and supports long distance paging networks. page to receive the page on another channel relayed to a remote area paging service and used by the local paging service. received in order to accommodate variable paging traffic on Dynamically programmed by channel programming commands that allow channel changes. It's glamorous. Modern long-distance commercial paging networks receive a single channel or sequentially scan a group of closely spaced channels in a single frequency band. Based on a paging receiver programmed with

FIG. 1 shows the paging reception disclosed in U.S. Pat. No. 4,851,830. A block diagram of the device 10 is shown. In order to realize the various functions shown in the block diagram in Figure 1, The actual circuit for this is shown in Figures 7-20 of U.S. Pat. No. 4,851,830. is shown. Furthermore, the main control program for the main CPU 24 is disclosed in U.S. Pat. ．． 851.830, as set forth in the appendix included within subheading No. 851.830.

The internal antenna 12 has a total of 10,600 possible frequencies from the three discrete frequency bands mentioned above. Functions to receive programmable channels. The channel is covered by U.S. Patent No. 4 ．． The channel programming commands disclosed in No. 851.830 is programmed. A large number of signals received in three different frequency bands Due to the available channels, antenna 12 has wideband reception characteristics. paging In the receiver, the antenna 12 has three frequencies designed for reception of channels. It is designed to resonate in all several bands. In other words , optimal impedance matching is desired.

The gain of antenna 12 is proportional to the person and antenna phase where the paging receiver is typically located. The results of the interaction and the interaction of the antenna with the physical surroundings of the paging receiver. subject to substantial fluctuations. The person's body, physical surroundings, where the paging receiver is located. The electrical interference caused by the main CPU 24 and VCO 30, which will be described later, is caused by the antenna 12 substantially reduces the gain of the received page applied to antenna circuit 14 by let Antenna circuit 14 has a specific channel that RF tuner 16 is tuned to receive. To maximize the gain of antenna 12 for the channel, the antenna tuning signal is This is a tuner that includes a variable capacitance diode that is added. The antenna circuit 14 is as follows. to tune the antenna 12 to achieve maximum gain in the manner described in detail; The antenna is tuned by an antenna tuning signal that functions as an antenna. The RF tuner 16 is UHF1 49-162 and 278-190MHz channels and 449-462MHz VHF Three separate radio frequency amplifiers and mixers, each receiving a channel 18.20 It consists of 22. The main CPU 24 determines in which frequency band the page is received. selectively activates one of the amplifier and mixer circuits 18.20 and 22, depending on the Controls the operation of the power controller 26. The digital receiver output by the main CPU24 The signal tuning signal is stored in the ROM 58, which will be described later, and is stored in the received 10.6000. Specifies one of the possible channels. The receiver tuning signal is specified by the receiver tuning signal. Phase synchronization to frequency lock the voltage controlled oscillator 30 on a defined specific channel. applied to loop 28. When a particular channel is received by RF tuner 16 , the main CPU 24 includes an amplifier and an amplifier for receiving channels received by the power controller 26. Digitally command a particular one of mixer circuits 18.20 and 22 to operate. do. By deactivating the remaining two amplifier mixer circuits, power is Three amplifier and mixer circuits are important in a television-operated paging receiver. 18.More is saved than is consumed if all of 20 and 22 are activated at the same time. Ru.

Voltage controlled oscillator 30 includes an amplifier and a microphone to generate a 21.4 MHz output signal. 18. The output frequency that is mixed with the signal received by one of 20 and 22. generate. The 21.4MHz output signal is filtered by a 21.4MHz filter 32. filtered. The output of the 21.4 MHz filter 32 is 450 kHz I It is applied to the IF processing signal circuit 34 to generate the F flaw signal. mixer oscillator 3 The output signal from the FM discrimination circuit 40 is It is applied to the IF amplifier 38 which amplifies the F flaw signal. R551 circuit (received signal strength standard) 42 is an output whose magnitude is directly proportional to the level of the output signal from the discriminator 40. Generate a force signal. The R55I signal output by the R85I circuit 42 is is applied to the antenna control circuit 44. The antenna control circuit 44 receives the antenna R55I signal. digital format for processing by a dedicated ASIC microprocessor An antenna-to-digital converter 46 is included to convert the antenna to digital. ASIC microprocessor - executes the program contained in the ROM in the ASIC circuit. ASI The C microprocessor receives a variable data signal applied to the digital antenna converter 48. It functions to generate a wobble signal that is output as a digital value and is For the purpose of continuously locking at the point of maximum gain when the antenna is An antenna having a variable antenna value that variably tunes the circuit 14 through the frequency band. generates a tuning signal. caused by the wobble of the tuned frequency of the antenna circuit 14. The fluctuations in signal amplitude are detected by the R55I circuit 42 and result in antenna control. Control circuit 44 controls the antenna circuit to achieve maximum gain for antenna 12. The tuned antenna continuously outputs the 11ffi signal. The antenna tuning signal is C It compensates for electrical interference caused by PU24 and VCO30, and also protects the human body. Unwanted during reception, such as variable inductance and capacitance caused by the physical surroundings. Compensate for environmental factors that change the gain of antenna 12. The discrimination circuit 40 detects no signal (response). F) or one of 15 discrete sinusoidal frequencies, each connected to the antenna or device. Digital FM Paging Receiver Signifies the different signal values received from any of the transmitters. code. The buffer amplifier 50 converts the sine output signal from the discriminator circuit 40 into the discriminator 40. level to produce a square wave with a period equal to the period of the sine signal output by amplify to The square wave output by the buffer amplifier 50 has a frequency of 400 filtered by a low pass filter 52 to attenuate the signal below the frequency range. low The output of pass filter 52 is a high pass filter that attenuates the channel above 3000 hertz. is applied to router 54.

Tone decoding circuit 56 is defined by low pass filter 52 and high pass filter 54. The discrete tones contained within the 400 to 3000 Hertz band are converted into 16 generate an output level signal indicating possible levels of

The main CPU 24 combines continuous encoded data transmission into a two-digit decimal number, Processes decimal numbers by decoding them into alphanumeric characters. Single encoded transmission is a digit used for only characters. The control program for the main CPU 24 is RO It is stored in M58. The ROM 58 also has an LCD display 64. In conjunction with the indicated control, the received potential is 10.600 in the preferred embodiment. channel and each frame as disclosed in U.S. Pat. No. 4,851,830. command structure table used to decode commands. RAM60 is , records pages containing specific memory sections addressable by commands. Has a separate memory section for storing channel programming commands Channels programmed to be received by will be restricted from receiving pages. a destination code to send or a page to receive a page in a geographic area; including the grouping receiver group and the paging receiver identification.

The raw CPU 24 controls the liquid crystal display drive circuit 62'. Liquid crystal drive circuit 62゛ drives the liquid crystal display 64'. The external data boat 67 is the main CPU 2 4 executes an external data command, separate data processing or storage from the discriminator 52. Attire! used to relay the output signal to. Boat 68 has an external printer It is coupled to the main CPU 24 for driving. Boat 69 has CPU 24 and external It is provided to establish the necessary communication between the printers. Display switch 70 is used to operate display 64'. The lighting switch 71 is Used to activate the backlighting of display 64'. switches 70 and 71 The control program of the main CPU 24 also causes the appropriate display to be displayed on the display 64. Used to input data when done in ゛　. Boat 72 is The paging receiver is coupled to a battery (not shown) to provide power. baud 73 is provided for activating an included audible alarm in the paging receiver. and the boat 74 connects the paging receiver to an external device such as a printer. Allows connection to an external antenna when used.

The main CPU 24 provides channel tuning for dynamically tuning the RF tuner 16 to discrete channels. respond to programming commands. Each channel programming command is For storage in the channel memory section of random access memory 60 , stored in ROM 58] among the 0.600 possible channels. decoded by main CPU 24 to output the channel change.

The continuously tunable antenna of the above paging receiver has at least one frequency for variable antenna gain resulting from in-band programmable channel reception. Provide dynamic compensation. Dynamic compensation of variable antenna gain prevents the antenna from receiving a programmer covering at least one frequency band when built into the instrument case; is especially important in achieving maximum coverage and accurate reception in the blue channel. Ru. As a result of the short length of the internal antenna, the body of the person holding the basing receiver and Surroundings in close proximity to a person often change the antenna gain substantially. Above base The dynamically tuned antenna of the tuning receiver is dynamically programmed from multiple frequency bands. paging with an internal antenna to receive pages on the channel Sufficiently compensates for antenna gain variations at the receiver.

The above-mentioned paging receiver suffers from deterioration in reception performance in urban areas. This inferiority is used to amplify pages received on channels included in the band. , an RF amplifier 18.2 having wideband reception characteristics over the entire bandwidth of each frequency band. Caused by 0 and 22. For example, if the paging receiver at one end of the frequency band by applying an output signal to a mixer in the amplifier. If tuned to receive a channel, the wideband amplification characteristics of the amplifier amplify the received signal contained in other parts of the This reduces the overall signal-to-noise ratio of the signal input to the mixer in the channel. signal pair The reduction in noise ratio is due to the frequency band containing the channel on which the paging receiver receives the page. A large number of other signals from non-vaging sources or other vaping channels within the region alphanumeric and numeric pages accurately in areas such as large metropolitan areas where severely degrades the ability of a paging receiver to receive data.

Disclosure of invention The present invention utilizes multiple licensed radio frequencies received by baging receivers around the world today. Achieving maximum gain in a channel received from at least one of the wavebands Improved paging using tunable antennas and tunable RF amplifiers for It is a receiver. The paging receiver is preferably used for paging receivers. program to receive at least one channel selected from multiple frequency bands used. channel programming commands. tuning A possible antenna is the antenna disclosed in U.S. Pat. No. 4,851,830. Each received antenna tuning sequence is the preferred form of antenna tuning sequence. The antenna is tuned to maximize antenna gain relative to the channel. With the invention, each R for amplifying the page received in any channel from the frequency band. The F amplifier has an operating bandwidth that is narrower in frequency than the frequency band, and the amplifier To maximize gain, center the operating bandwidth within the frequency band on a given channel. tuned to shift.

From the licensed wireless common frequency band used for paging receivers by testing The addition of a tunable RF amplifier to receive the channel reduces the R by up to 10 dB. It has been shown to increase the gain of the signal output from the F amplifier. Reception of Figure 1 Approximately 65 dB down from the operating bandwidth over the entire frequency band as in The narrowing of the operating bandwidth of the RF amplifier according to the invention to an operating bandwidth of 675 kHz is In areas where a large number of other signals are present in the frequency band in which the channel is received. improve the reliability of receiving pages. Tunable antenna and tunable RF Amplifier combinations today worldwide are The actual page that was transmitted on the FM radio common carrier within the licensed band Up to the line of point distance, which is the limit of (Allow to receive.)

Brief description of the drawing FIG. 1 shows a prior art paging receiver of the assignee of the present invention.

FIG. 2 shows a block diagram of a paging receiver according to the invention.

FIG. 3 is a block diagram of an RF amplifier according to the invention.

Figure 4 shows the RF amplifier tuning signal, receiver tuning signal, R55I signal and designated channel. Shows a graphical relationship between frequencies.

FIG. 5 shows the gain characteristics of each RF amplifier of the paging receiver of the present invention within the frequency band. shows.

FIG. 6 shows a circuit diagram for realizing the RF amplifier 104 in the block diagram of FIG. vinegar.

FIG. 7 shows a circuit for realizing the RF amplifiers 106 and 108 in the block diagram of FIG. Show the route map.

FIG. 8 shows the operation of the controller when tuning the antenna of the paging receiver according to the present invention. FIG.

FIG. 9 is a flow diagram illustrating the operation of a controller in tuning an RF amplifier according to the present invention. be.

FIG. 10 shows the operation of the controller in fine tuning the gain of the antenna according to the invention. This is a flowchart.

Best mode for carrying out the invention FIG. 2 shows a block diagram of an RF paging receiver 100 according to the present invention. similar 1 and 2 are identified by like reference numerals in FIGS. Figure 1 Parts of FIG. 2 that are identical to those shown in FIG. 2 and are not necessary for understanding the invention are not discussed in connection with FIG. The paging receiver 100 of FIG. An RF amplifier included in each of amplifiers and mixers 104, 106 and 108 shiftable centering by the RF amplifier tuning signal in the channel being transmitted. The paging receiver of FIG. 1 differs from the paging receiver of FIG. RF The amplifier tuning signal is a function of the receiver tuning signal and the R55I signal. RF amplifier same The record number is generated by the controller 102. The controller 102 is the prior art of FIG. controlling the antenna 12 in the same manner as described in connection with the technique; An RF amplifier tuning signal is generated as described below in connection with FIGS. 3 and 4. RF The amplifier tuning signal determines the operating bandwidth of the RF amplifiers and mixers 104, 106 and 108. , which is generated by the IF amplifier 34 used in prior art FIG. shifted as a function of the antenna gain as shown by the R55I signal, The antenna is tuned as specified by the receiver tuning signal generated by the main CPU 24. tune the antenna 12 and the channel being received. As described below, the specified channel is received. RF amplifier and mixer 104 .operated by power controller 26 to transmit signals. The operating bandwidth of one of 106 and 108 is shifted to track the antenna gain. centering the operating bandwidth of the RF amplifier to produce the maximum gain of the amplified signal. A receiver tuning signal for tuning is applied to a mixer within the activated RF amplifier. R The operating bandwidth of each of the F amplifiers is tuned to a much narrower frequency range, in the preferred implementation. In embodiments, a point 65 dB down from the maximum amplitude at the center frequency of the operating bandwidth. It is approximately 675 kilocycles wide. Each amplifier 104, 106 and 108 is Each of the two licensed wireless common carrier frequency bands in which pages are transmitted in the world today. Each channel is tuned to receive channels across a 13 megacycle bandwidth. R F Amplifiers and Mixers 104. The amplifiers in 106 and 108 are the channels being received. resulting in a much higher Q than the 13 megacycle bandwidth of the licensed frequency band. amplification of other signals within the received frequency band but outside the operating bandwidth is eliminated. increases the signal-to-noise ratio of the output signal from the amplifier by up to 10 dB.

FIG. 3 shows each of the RF amplifiers and mixers 104, 106 and 108 according to the present invention. A block diagram is shown. Receiving channels from licensed frequency bands that contain other signals within the frequency band The R channel has a shiftable operating bandwidth as described below in connection with FIG. F is applied to amplifier 120. The operating bandwidth of RF amplifier 120 is related to FIG. To center the operating bandwidth under the control of the RF amplifier tuning signal, as described below. In order to Ru. The output of RF amplifier 120 includes a signal within the operating bandwidth. Operating bandwidth is 55 As a result, the frequency containing the receive channel is approximately 675 KHz at the dB down point. The majority of other signals within a few bands are rejected by the RF amplifier, and the majority of signals are received. For example, in a metropolitan area that is within the frequency band that contains the communication channel but outside the operating bandwidth. (better in the area than achieved by the prior art paging receiver of FIG. also substantially increases the signal-to-noise ratio by up to about 10 dB. Mixer 130 is a receiver As a result of the tuning signal being applied by VCO 30, the It functions in a conventional manner to shift the frequency of the output signal to an intermediate frequency. Ru. The output of the mixer is passed through a filter 32, as in the paging receiver of FIG. is applied to the IF amplifier 34.

Figure 4 shows the RF amplifier tuning signal as a function of the receiver tuning signal and the R55I signal. Show the relationship graphically. In a preferred embodiment of the invention, the RF amplifier tuning signal is proportional to the sum of the receiver tuning signal and the R55I signal.

The receiver tuning signal is a linear function of the designated channel received within the licensed frequency band. Therefore, the receiver tuning signal has a minimum (e.g., 3.5 volts) and is the highest voltage on the highest channel in the frequency band. , received in the licensed frequency band between the lowest and highest channels of the licensed frequency band. varies directly proportional to the frequency of the channel being played. For example, the lowest and highest The reception of the channel in the middle of the channel has 1/2 of the maximum level of the receiver tuning signal. Generates a receiver tuning signal. The R85I signal is generated by IF amplifier 34. is directly proportional to the level of the output signal output from the paging receiver of FIG. used in the generation of the antenna tuning signal applied to the antenna circuit 14 as shown in FIG. It will be done. The RSS I signal varies linearly as a function of antenna gain. Controller 10 2 generates an RF amplifier tuning signal proportional to the sum of the receiver tuning signal and the R55I signal. However, the magnitude of the RF amplifier tuning signal changes with the fluctuation of the R35I signal, and the RF amplifier tuning signal The antenna gain with the receiver tuning signal component of the tuning signal is is constant. The RF amplifier tuning signal is the same as the fixed receiver tuning signal and the antenna gain. As a result, the RF amplifier tuning signal is proportional to the R85I signal, which is directly proportional to the variation. RF amplifier movement to center the operating bandwidth on the designated channel being received. By providing a voltage to shift the operating bandwidth, the ability of the paging receiver according to the invention is improved. Achieve maximum gain to provide maximum signal-to-noise ratio from the transmitter to substantially increase Areas that are long distances and have a large number of signals in the frequency band where the page is received area, accurately receive pages containing identifying characters within alphanumeric pages.

Figure 5 shows that as a function of the total bandwidth of each frequency band of the channel that the amplifier amplifies, RF amplifier and mixer 104. Shows the gain characteristics of each of the amplifiers 106 and 108. . The amplifier operating bandwidth is centered under the control of the RF amplifier tuning signal at the sixth ~7 By changing the capacitance of the varactor diode included in the amplifier shown in Figure 7, shifted to The operating bandwidth is +387.5KHz from the center frequency. It has a 65dB drop point.

6-7 illustrate the RF frequency included in the RF amplifier and mixer 104-108 of FIG. Figure 2 shows a circuit diagram of a preferred embodiment of the amplifier. of the components within the RF amplifier, including the values It is understood that the choices may vary from those shown according to the invention. part number is the manufacturer or industry designation. The resistance value is several thousand ohms and the capacitance value is , in picofarads, and the inductance value is in nanohenries. a The antenna tuning gain is the impression of the antenna tuning signal on the variable capacitance diode BBY31. The antenna tuning signal changes the capacitance in proportion to the antenna tuning signal. RF amplification The operating bandwidth of the amplifier is determined by applying the amplifier tuning signal to the variable capacitance diode BBY40. Thus, it is shifted and changes its capacitance in proportion to the RF amplifier tuning signal.

FIG. When receiving a designated channel identified as a modulation signal, the gain of antenna 12 is set to the maximum value. Controller 10 with reference to FIG. 2 when generating an antenna tuning signal for 2 shows an operation flowchart. Operation of the controller 102 proceeds to point 1002 where the designated channel is A stored antenna tuning signal, which is a function of the and a varicap diode as shown at point 1004 in antenna circuit 14. applied to the code.

Preferably, the stored antenna tuning signal determines the maximum antenna gain for the designated channel. Set the voltage to be approximately 15% lower than the voltage that produces . Each 13MHz band is It is divided into 26 index voltages stored in the memory of controller 102. Controller 102 is for the initial tuning of the antenna 12 to the designated band where the designated channel is located. selects the stored antenna tuning signal assigned to the specified channel. Therefore, Each channel within each band of received channels is The assigned antennas stored in the memory of the controller 102 are approximately 5% smaller than the pressure. It has a tonal signal.

Controller 102 receives output signals from IF processing signal circuit 34, as shown at point 1006. Measure and store the magnitude of the applied R85I signal. The controller 102 controls the point 1008 As shown in Figure 2, a pre-antenna tuning signal read out from memory is Add a voltage increase. At point 1010, controller 102 responds to the increased voltage. The R3S I signal is measured and recorded as output by the IF processing signal circuit 34. I remember. Controller 1o2 at point 1012, at points 1006 and 1010 Compare the stored voltages and determine if there is an increase. At points 1o12 the answer is ryesJ, the operation returns to point 1008 and refers to points 1008 and 1010. Then add another incremental voltage increase as described above. At points 1o12 the answer is If rnoJ, the operation of controller 102 proceeds to point 1o14, where the antenna The key signal is set to correspond to the highest R35I signal. Furthermore, step 1 A loop consisting of 008 to 1o14 is used to determine the optional voltage. It is performed multiple times, such as three times, before finally setting the tenor tuning signal. step Iterations 1008-1014 increase optimization of the antenna tuning signal. Point 1o12 Once the “nO” decision is reached in , the R3S1 signal increases in magnitude. large, reaches a maximum, and is decreasing in size. page on specified channel The operation of the antenna circuit 14 for the designated channel when receiving the by the antenna tuning signal as determined at 1014 and thereafter as determined below. Follow the flowchart in Figure 10.

The invention provides a constraint that is less (preferably 15%) than the voltage that produces the optimal antenna gain. described by the initial stored value of the antenna tuning signal contained in the memory of the controller 102. However, the magnitude of the voltage stored by the controller's memory may alternatively be larger. , it is understood that the incremental voltage step at point 1008 may be a voltage decrease. . Furthermore, the voltage that produces the maximum gain is stored by the memory of the controller 102. A smaller percentage is chosen to be a value different from 15%.

Figure 9 shows the specific When optimizing the gain of the RF amplifier, generate the RF amplifier tuning signal as shown in Figure 2. 2 shows a flowchart of the operation of the controller 102 when the controller 102 performs the following steps.

The phase-locked loop 28 is used during the RF amplifier tuning process and when the While receiving a fixed channel, it is locked to the specified channel output by the main CPU 24. It will be done. Each of the RF amplifiers 104-108 generates an RF signal by applying power to the amplifier. tuned to the channel received within the band of channels received by the amplifier That is understood. The RF amplifier tuning process was described above with reference to FIG. Antenna] Similar to the tuning process of 2. Operation of controller 102 continues to point 1100. The designated channel to be read and received is read out from the raw CPU 24. Controller 102 Operation proceeds to point 1102, where the stored RF amplifier tuning signal is a function of the designated channel. The voltage magnitude is read from memory within the controller, and the voltage is generated and As shown at 1104, the variable voltage in the RF amplifier receiving the designated channel applied to the cap diode. Preferably, the stored RF amplifier tuning signal is RF Set the voltage applied to the amplifier to be less than the voltage that produces maximum RF amplifier gain do. Each 13 MHz band has eight index voltages stored in memory of controller 102. divided into The controller 102 controls R for the designated band in which the designated channel is located. Select the storage amplifier tuning signal assigned to the designated channel for tuning the F amplifier. Choose. Therefore, each channel within each band of received channels has a maximum RF amplification of an assignment stored in the memory of the controller 102 that is less than the voltage that produces the device gain. The initial amplifier tuning signal has a voltage magnitude. Controller 102 is indicated at point 1006. IF processing circuit 3 in response to application of a storage amplifier tuning signal to the RF amplifier, as shown in Measure and store the magnitude of the resulting R35I signal generated by 4. Controller 1 02 is the preamplifier same value read from memory as shown at point 1008. A predetermined incremental voltage increase is added to the modulation signal. At point 1010, controller 102 , measure and record the resulting R85I signal as output by the IF processing signal circuit 34. I remember. Controller 102 at point 1112 and at points 1106 and 1110 Compare the stored voltages and determine if there is an increase. At point 1112 the answer is ryesJ, the operation returns to point 1108 and refers to points 1108 and 1110. (Add another incremental voltage increase. At point 1112 the answer is If rnoJ, operation of controller 102 proceeds to point 1114 and adjusts amplifier tuning. The signal is set to correspond to the highest R85I signal generated. designated channel The operation of the RF amplifier receiving the page at point 1014 is determined at point 1014. according to the amplifier tuning signal.

The invention includes a memory in the controller 102 that is less than the voltage that produces the optimal amplifier gain. As described in connection with FIG. 9, the controller The magnitude of the voltage stored by the memory at point 1108 is alternatively larger and at point 1108 It is understood that the voltage step at may be decreased. Furthermore, controller 1 less than the voltage that produces the maximum RF amplifier gain stored by the 02 memory. percentages are chosen to have different values.

FIG. 10 shows that objects in close proximity to the basing receiver, such as, but not limited to buildings, caused by factors such as movement of the related paging receiver or removal from the person's body. During page reception, the antenna tuning signal is adjusted to compensate for variations in antenna gain. 3 shows a flowchart of the operation of the controller 102 in continuously fine-tuning the signal. of the above format The factors are the optimal values established by the initial tuning process described with reference to FIG. The antenna gain can be detuned during page reception from the value. Synchronized professional mentioned below The frequency response of the RF medium due to multipath Raleigh fading is The slow speed is chosen to prevent changes from retuning the antenna circuit 14. It will be done.

Once a tuning “history” has been acquired for a particular channel, the tuning process proceeds as follows: The last six R55I signal samples are compared, and the last three It is determined whether the sample is higher or lower than the first three samples. All of the previous samples exceeds all of the final samples, controller 102 controls the antenna measurement variance. step down the motor voltage. The measurement result in this case is that the average received signal strength is higher than the previous reception. Indicates that it is small. The RF amplifier gain is initial tuned as described with reference to Figure 9. Only the antenna varactor has this point because it was previously optimized in the process. Changes will be made in The controller 102 performs one step depending on whether the difference is small or large. Reduce the antenna tuning signal by one or three steps. Three “adjustments” were made, If the R55I average reading decreases, the controller 102 changes the tuning to the three precondition voltages. the antenna tuning signal for optimal received signal readings. increase

This step-by-step "fine" tuning of the antenna circuit will improve the received signal under the changing conditions described above. Optimize the number. It tunes the boundaries of the tuning limit or is not optimized (tunnel or as an external influence (such as signal strength at the base).

Loop damping of the regulated voltage is achieved through the use of an R-C time constant in the antenna circuit 14. , and also samples of the R55I signal are taken at approximately 900 ms intervals. This is caused by the fact that

dynamically changing the capacitance of a varactor diode included in the antenna circuit 14; By doing so, the operation of the controller 102 when fine-tuning the antenna gain is The operation is described as follows with reference to Figure 0. Proceed from 1200. The sampling rate is preferably once every 900 milliseconds. and is smaller than the frequency at which the transient signal substantially affects the signal magnitude. motion goes to point 1202, where the previous sample is processed as the last three of the six samples including the current sample. sample is added. The samples are continuously updated with new samples and old samples are It is understood that samples are discarded. The operation proceeds to point 1204 and then to point 1200 The current sample containing the sample determined in is added. Point 1206 smell Then, all determined at points 1202 and 1204 are compared. to point 1206 The comparison between the If the decision is "no" at point 1208, the operation moves to point 1200. return. The difference is greater than a predetermined threshold and is determined by ryesJ at point 1208. , then the signal strength variation indicated by the variation in the magnitude of the R55I signal In order to compensate for the motion, it is necessary to change the antenna gain. Point 1208 The magnitude of the change exceeding the threshold determined at point 0 is determined at point 1210. If the threshold value is greater than the determined threshold, controller 102 causes the controller 102 to Stepping down the antenna tuning signal by three predetermined increments as shown in FIG. However, the point If the change at 1210 is less than the threshold, controller 102 controls point 121 Stepping down the antenna tuning signal by one predetermined increment as shown at 4. Point 1 The sequence of steps at 200-1214 is as shown at point 1216. Iterated for three loops. At point 1218, point 1 in three loops The effect of lowering the antenna tuning signal is determined at 212 and/or 1214. It will be done. If the effect at point 1218 is determined not to be a drop in the R55I signal. For example, the operation may increase the antenna utilization as indicated by the increase in the magnitude of the R55I signal. Return to point 1200 because you have made a profit. The process described above causes the R55I signal to increase Continue as long as you continue to do so. However, the effect at point 1218 is below the R55I signal. If it is determined that the antenna tuning signal is As a result, the voltage level of the antenna tuning signal decreases to produce a decreased R55I signal. indicates that must be increased. The operation is similar to point 1210 Proceed to step 22. Point 1224 except that the voltage is increased by three voltage increments. , similar to point 1214. Point 1226 is where the voltage is increased by one voltage increment. Similar to point 1214 except that. Point 1228 is similar to point 1216. point 1230 is similar to point 1218. Point 1232 has a voltage increment equal to point 1212 and / or when added at 1214, in the next processing loop, points 1224 and and/or to cancel the effect of positive increments at 1226. Figure 3 shows an incremental change in tenor tuning signal.

The above operation is modified to change the number of samples at points 1218 and 1228. It is understood that you may do so. Furthermore, points 1212.1214.1224 and 12 The relative difference in increments at 26 is changed from 3 to 1 to some other value.

The processes shown in Figures 8-10 can be performed using any known programming method or language. is programmed in controller 102. Furthermore, the processor 102 It may be a CPU, ASIC or other controller with a custom mask.

Although the invention has been described in terms of preferred embodiments, many modifications can be made without departing from the spirit and scope of the invention. It is understood that this may be done without departing from the For example, the preferred Although embodiments relate to pages containing alphanumeric characters, the invention also relates to pages containing alphanumeric characters, but the invention also relates to pages containing alphanumeric characters. Alone or in combination with other alarms such as alphanumeric characters or audible alarms It is understood that it is used on pages that contain pages. Additionally, a separate RF amplifier , for each frequency band of the received channel in the preferred embodiment of the invention. However, one RF amplifier is used for the 280 and 450 MHz bands (one It is understood that it is used to amplify signals from frequency bands above. So All such modifications are intended to come within the scope of the appended claims.

(vinegar RFJit axis each creation dB −Park FJG, 8 FIG.9 September 27, 1991 Commissioner of the Patent Office Wataru Fukasawa Uji 1. Display of patent application pcT/US 90101594 2. Name of the invention Basing Receiver with Continuously Tuned Antenna and RF Amplifier 3, Patent Applicant Name: Telefind Corporation 4, Agent: 107 6. List of attached documents (1) Copy and translation of written amendment) 1 letter 68, changes as a result of variable antenna gain. RF reception tunable to at least one designated channel with a signal strength that In order to change the antenna gain for a designated channel in the An antenna that is tunable in response to a tuning signal and an applied channel that specifies reception of a designated channel. to a tunable antenna to receive a designated channel in response to a channel tuning signal. With a coupled RF tuner, the signal level in the receiver is proportional to the antenna gain. a circuit coupled to the RFrgJ modulator for generating a received signal strength indicator for Generate an antenna tuning signal that produces maximum antenna gain for the receive channel In order to An antenna tuning circuit responsive to the tuned signal and an RF tuning circuit responsive to the tuned signal and an RF tuning circuit responsive to the tuned signal. a controller for controlling generation of an applied channel tuning signal to tune the tuner; RF receiver equipped with.

69. A method for tuning an antenna of an RF receiver, in which multiple channels are received. identifying a channel received by an RF receiver from a channel; Tuning the RF tuner to the identified channel and determining the best To produce large antenna gain, the tuner is tuned to signal strength and a stored antenna tuning signal that is a function of the received channel. and tuning the antenna in accordance with the response.

70, the stored antenna tuning signal produces an antenna gain that is less than the maximum gain; The antenna tuning signal is designed to produce the maximum strength of the signal received in the channel. the stored antenna signal to change the antenna gain; The antenna tuning signal is used to tune the antenna to produce maximum antenna gain. Claim rM6 set equal to the antenna tuning signal that produced the maximum strength for 9.

71, the antenna tuning signal is varied incrementally until the maximum strength of the signal is produced. 71. The method of claim 70.

72, the antenna tuning signal is varied a plurality of times to produce the maximum intensity. Re, The antenna tuning signal is used to tune the antenna to produce maximum antenna gain. The antenna that produced the maximum antenna gain among several different times that the maximum strength was produced for 70. The method of claim 69, wherein the tenor tuning signal is set equal to the tenor tuning signal.

73, the antenna tuning signal is varied a plurality of different times to produce the maximum intensity. Re, The antenna tuning signal is used to tune the antenna to produce maximum antenna gain. The antenna that produced the maximum antenna gain among several different times that the maximum strength was produced for 71. The method of claim 70, wherein the tenor tuning signal is set equal to the tenor tuning signal.

81. A method for tuning an antenna of an RF receiver, in which multiple channels are received. identifying a channel received by an RF receiver from a channel; Tuning the RF tuner to the identified channel and determining the best To produce large antenna gain, the memory antenna is a function of the received channel. and tuning an antenna in response to a tuning signal.

82, the stored antenna tuning signal produces an antenna gain that is less than the maximum gain; The antenna tuning signal is designed to produce the maximum strength of the received signal in the channel. the stored antenna signal to change the antenna gain; The antenna tuning signal is used to tune the antenna to produce maximum antenna gain. Claim 81 set equal to the antenna tuning signal that produced the maximum intensity for The method described in.

83, the antenna tuning signal is varied incrementally until the maximum strength of the signal is produced. 83. The method of claim 82.

84, the antenna tuning signal is varied a plurality of different times to produce the maximum intensity. Re, The antenna tuning signal is used to tune the antenna to produce maximum antenna gain. The antenna that produced the maximum antenna gain among several different times that the maximum strength was produced for 82. The method of claim 81, wherein the tenor tuning signal is set equal to the tenor tuning signal.

93. Method for tuning an amplifier of an RF receiver, in which multiple channels are received. identifying a channel received by an RF receiver from Tuning the RF tuner to the identified channel and determining the best To produce large amplifier gain, a tuner is the storage amplifier tuning signal, which is a function of the received channel. and tuning an RF amplifier.

94, the storage amplifier tuning signal produces an amplifier gain that is less than the maximum gain; Because the amplifier tuning signal produces the maximum strength of the received signal in the channel is varied from the stored amplifier signal to vary the amplifier gain; The amplifier tuning signal is used to tune the amplifier to produce maximum amplifier gain. as claimed in claim 93, set equal to the amplifier tuning signal that produced the large intensity. Method.

95, the amplifier tuning signal is varied incrementally until the maximum strength of the signal is produced. 95. The method of claim 94.

96, the amplifier tuning signal is varied a plurality of different times to produce the maximum intensity. , The amplifier tuning signal is used to tune the antenna to produce maximum amplifier gain. Amplifier tuning that produced the maximum amplifier gain among multiple different times that the maximum intensity was produced 94. The method of claim 93, wherein the signal is set equal to the signal.

105. A method for tuning an amplifier of an RF receiver, in which multiple channels are received. identifying a channel received by an RF receiver from a channel; Tuning the RF tuner to the identified channel and determining the best To produce large amplifier gains, the storage amplifier gain is a function of the received channel. and tuning an amplifier in response to a tuning signal.

106, the storage amplifier tuning signal produces an amplifier gain less than the maximum gain and increases The width amplifier tuning signal is used to produce the maximum strength of the received signal in the channel. , is varied from the storage amplifier signal to vary the amplifier gain; The amplifier tuning signal tunes the amplifier to produce maximum amplifier gain. set equal to the amplifier tuning signal that produced the maximum intensity. How to put it on.

107, the amplifier tuning signal is varied incrementally until the maximum strength of the signal is produced. 107. The method of claim 106.

108, the amplifier tuning signal is varied a plurality of different times to produce the maximum intensity; Re, The amplifier tuning signal tunes the amplifier to produce maximum amplifier gain. The same amplifier that produced the maximum amplifier gain during several different times that the maximum intensity was produced 106. The method of claim 105, wherein the modulation signal is set equal to the modulation signal.

international search report

Claims (1)

[Claims] 1. an RF paging receiver tuneable to channels to receive pages, the pages being transmitted in at least one licensed frequency band, each frequency band including a plurality of FM channels; receiving channel RF paging where the signal strength of the channel page changes as a result of variable antenna gain (a) has a reception bandwidth spanning at least one frequency band; (b) a tunable antenna that is tunable in response to an antenna tuning signal to achieve maximum antenna gain for a receive channel in at least one licensed frequency band; a combined RF tuner with at least one frequency the RF tuner is tuneable to receive individual channels from the at least one frequency band in response to changes in a receiver tuning signal specifying reception of one of the channels within the frequency band; at least one RF amplifier for amplifying the received page in any channel within the frequency band; has an operating bandwidth that is narrower in frequency than at least one frequency band and is designed to center the operating bandwidth within at least one licensed frequency band in a designated channel; (c) an IF amplifier coupled to the RF tuner to generate an intermediate frequency signal containing a page to be transmitted in a designated channel; (e) means responsive to the intermediate frequency signal to generate an antenna tuning signal using the intermediate frequency signal and the receiver tuning signal; an RF paging receiver comprising: means responsive to a device tuning signal; 2. 2. The RF paging receiver of claim 1, wherein the paging receiver is tuneable to channels within multiple frequency bands. 3. The amplifier tuning signal is proportional to the sum of the intermediate frequency signal and the receiver tuning signal, and the receiver tuning signal is proportional to the channel having the lowest frequency in the at least one frequency band. amount in at least one frequency band from the minimum value to channels with high frequencies 3. The RF paging receiver of claim 2. 4. (a) the RF tuner has a plurality of RF amplifiers, each RF amplifier having at least also amplifies pages received in a channel from one frequency band, The RF amplifier has an operating bandwidth that is narrower in frequency than the frequency range and shifts to center the operating bandwidth within the RF amplifier frequency band in response to a designated channel's RF amplifier tuning signal. 4. The RF paging receiver according to claim 3, wherein the RF paging receiver is capable of 5. an RF paging receiver tuneable to channels to receive pages transmitted in at least one licensed frequency band, each frequency band including a plurality of FM channels; Nobe In an RF paging receiver in which the signal strength of a page varies as a result of variable antenna gain, the antenna includes: (a) a tunable antenna having a reception bandwidth over at least one frequency band and a reception channel in at least one licensed frequency band; Tuneable in response to an antenna tuning signal to achieve maximum antenna gain for (b) an RF tuner coupled to the tunable antenna, the RF tuner having at least one frequency band; the RF tuner is capable of tuning to receive each of the individual channels from at least one frequency band in response to a change in a receiver tuning signal specifying reception of one of the channels within the wavenumber band; Equipped with one RF amplifier, each RF amplifier The receiver is configured to detect a page received on any channel within at least one frequency band. at least one frequency band of the channel amplified and applied to the RF amplifier. an RF amplifier having an operating bandwidth narrower in frequency than the (c) an RF tuner that is shiftable to generate an intermediate frequency signal; IF signal processing means coupled to the RF tuner and receiver tuning signals for the purpose of In order to dynamically tune the antenna to achieve maximum gain in response to variations in the antenna gain when receiving channels from one of the channels in the same frequency band. During operation, the RF tuner generates an antenna tuning signal that is a function of the intermediate frequency signal and an RF amplifier tuning signal that is a function of the intermediate frequency signal and the receiver tuning signal. (d) causing the RF tuner to receive a specified channel from at least one frequency band; a controller coupled to an intermediate frequency signal for controlling the generation of a receiver tuning signal to provide an RF paging receiver. 6. 6. The RF paging receiver of claim 5, wherein the paging receiver is tuneable to channels within multiple frequency bands. 7. The amplifier tuning signal is proportional to the sum of the intermediate frequency signal and the receiver tuning signal, and the receiver tuning signal is proportional to the channel having the lowest frequency in the at least one frequency band. from the minimum value to the channel with the highest frequency within at least one frequency band. 7. The RF paging receiver of claim 6. 12. An RF paging receiver that can tune to a channel to receive pages. RF paging, in which the pages are transmitted in at least one licensed frequency band, each band including a plurality of FM channels, and in which the signal strength of the received channels in the at least one band varies as a result of variable antenna gain. (a) a receiver having a reception bandwidth spanning at least one frequency band; antenna with a receiving channel in at least } licensed frequency bands. (b) an RF tuner coupled to the tunable antenna, the antenna being tunable in response to an antenna tuning signal to achieve maximum antenna gain for the antenna; the RF tuner is capable of tuning to receive each of the individual channels from at least one frequency band in response to a change in a receiver tuning signal specifying reception of one of the channels within the wavenumber band; Equipped with one RF amplifier, each RF amplifier The device amplifies pages received on any channel within at least one frequency band, and has an operating bandwidth narrower in frequency than at least one frequency band of the channels applied to the RF amplifier, and has a specified Mark the RF amplifier in the channel. centering the operating bandwidth within the licensed frequency band of at least one of the added channels; (c) an RF tuner that is shiftable to transmit a page on a designated channel; (d) means responsive to the intermediate frequency signal to generate an antenna tuning signal as a function of the intermediate frequency signal; and (e) an RF amplifier tuning signal as a function of the intermediate frequency signal and the receiver tuning signal. An RF paging receiver comprising means responsive to an intermediate frequency signal and a receiver tuning signal to generate an intermediate frequency signal. 13. The paging receiver must be able to tune to channels within multiple frequency bands. RF paging receiver according to claim 12. 14. the amplifier tuning signal is proportional to the sum of the intermediate frequency signal and the receiver tuning signal, and the receiver tuning signal is proportional to the channel having the lowest frequency in the at least one frequency band. 14. The RF paging receiver of claim 13, wherein the RF paging receiver varies from a minimum value for a channel having the highest frequency in the at least one frequency band to a maximum value for the channel having the highest frequency within the at least one frequency band. 15. (a) the RF tuner has a plurality of RF amplifiers, each RF amplifier having at least one both amplify the pages received in a channel from one frequency band, have an operating bandwidth that is narrower in frequency than the frequency band, and have an RF amplifier of a designated channel. adjusting the operating bandwidth within at least one frequency band of the RF amplifier in response to the modulated signal; 15. The RF paging receiver of claim 14, which is tunable for grading. 23. An RF paging receiver that can be tuned to a channel to receive pages. the page is transmitted in at least one licensed frequency band, each frequency band including a plurality of FM channels, and the page is transmitted in at least one licensed frequency band; In an RF paging receiver in which the signal strength of a page of communication channels varies by channel programming achieved by channel programming commands, the receiver comprises: (a) an antenna having a reception bandwidth spanning at least one frequency band; and (b) coupled to the antenna. an RF tuner configured to receive at least one of the channels in the at least one frequency band in response to a change in the receiver tuning signal specifying reception of one of the channels within the at least one frequency band; also receives individual channels from one frequency band, and the RF tuner receives multiple RF amplifiers. each RF amplifier is equipped with a channel amplifier from at least one licensed frequency band. Each RF amplifier amplifies the frequency band of the channel applied to the RF amplifier. The frequency has a narrow operating bandwidth and can be shifted to center the operating bandwidth within the frequency band of the channel applied to the RF amplifier in a designated channel. (c) IF signal processing means coupled to the RF tuner and the receiver tuning signal to produce an intermediate frequency signal, the RF amplifier being a function of the intermediate frequency signal and the receiver tuning signal; (d) IF signal processing means for generating a tuning signal; Specifies reception on the channel specified by the receive channel programming command. an intermediate frequency for controlling the generation of a receiver tuning signal applied to an RF tuner to an RF paging receiver comprising: a controller coupled to multiple signals; 24. The paging receiver must be able to tune to channels within multiple frequency bands. RF paging receiver according to claim 23. 25. the amplifier tuning signal is proportional to the sum of the intermediate frequency signal and the receiver tuning signal, and the receiver tuning signal is proportional to the channel having the lowest frequency in the at least one frequency band. 25. The RF paging receiver of claim 24, wherein the RF paging receiver varies from a minimum value for the channel having the highest frequency in the at least one frequency band to a maximum value for the channel having the highest frequency within the at least one frequency band. 30. in an RF paging receiver tuneable to at least one designated channel; an RF tuner for receiving a designated channel in response to an applied channel tuning signal specifying reception of the designated channel; and for generating an intermediate frequency signal and a received signal strength indicator proportional to the level of the intermediate frequency signal. an intermediate frequency circuit coupled to an RF tuner and a receiver for a designated channel. control the generation of an applied channel tuning signal to tune the RF tuner to a controller coupled to the intermediate frequency signal for increasing the gain of the RF amplifier; An RF paging receiver comprising a tunable RF amplifier responsive to a storage voltage that is a number. 31. RF receiver tuneable to a plurality of channels within at least one frequency band, an RF tuner for receiving a channel in response to an applied channel tuning signal specifying reception of a receive channel; Includes a tunable RF amplifier with an operating bandwidth that is narrower in frequency than the bandwidth, and maximizes the gain of the RF amplifier. An RF tuner that is shiftable to center the bandwidth operates in a designated channel in response to changes in the RF amplifier tuning signal to increase the RF amplifier tuning signal while receiving transmissions in the receive channel. combined with storage amplifier tuning signal in response to the signal level generated by the intermediate frequency circuit An RF receiver comprising: an RF amplifier tuning signal generation circuit for varying an RF amplifier tuning signal from a signal; and a controller for controlling generation of an applied channel tuning signal. 32. The stored RF amplifier tuning signal applied to the RF amplifier is the applied channel tuning signal. setting the RF amplifier to a gain that is not the maximum gain for the channel specified by the signal. and thereafter, the stored RF amplifier tuning signal applied to the RF amplifier is changed by the RF amplifier tuning signal generation circuit to an RF amplifier tuning signal different from the stored RF amplifier tuning signal and specified by the applied channel tuning signal. 32. The RF receiver of claim 31, wherein a large gain is generated by the RF amplifier for the channel. 33. The RF amplifier tuning signal generation circuit incrementally changes the storage amplifier tuning signal until the signal level generated by the intermediate frequency circuit reaches a maximum level; In response to the intermediate frequency signal reaching the maximum level in the intermediate frequency signal, the RF amplifier tuning signal is set to the RF amplifier tuning signal that produced the maximum level in the intermediate frequency signal. the channel tuning signal specified by the applied channel tuning signal to cause the amplifier to produce maximum gain. 33. The RF receiver of claim 32 for receiving a channel. 34. RF amplifier tuning signal generation when generating an amplifier tuning signal that produces maximum gain The raw circuit performs a regression process that incrementally changes the RF amplifier tuning signal, The resulting signal level generated by the interfrequency circuit is stored and the RF amplifier tuning signal is Comparing the resulting signal level with the signal level produced by the intermediate frequency circuit produced before incrementally changing the signal, the incremental change in the RF amplifier tuning signal increases the resulting signal level from the intermediate frequency signal. The RF amplifier Repeat the incremental changes in the tonal signal, store the resulting signal, and apply it to an intermediate frequency circuit. until the signal level generated by the intermediate frequency circuit reaches its maximum level. 34. The RF receiver of claim 33, wherein the RF receiver compares the obtained result and the previous signal level. 43. a plurality of channels in at least one frequency band having a received signal strength that varies as a result of variable antenna gain during reception of transmissions in the receive channels; In an RF receiver that is tunable to a receive channel, the receive channel is an antenna that is continuously tuneable in response to an antenna tuning signal to vary the antenna gain for the channel; and an antenna that is tuneable to receive the channel in response to an applied channel tuning signal that specifies reception of the receive channel. an RF tuner coupled to the antenna; an intermediate frequency signal; and a receive signal proportional to the level of the intermediate frequency signal during reception of the transmission in the receive channel. an intermediate frequency circuit coupled to the RF tuner to generate a signal strength indicator; an antenna tuning circuit responsive to the received signal strength indicator and a stored antenna tuning signal that is a function of the received channel; The antenna tuning circuit continuously generates an antenna tuning signal that produces maximum antenna gain for the receive channel. also includes one stored previous received signal strength indicator and at least one stored current received signal strength indicator. comparing the signal strength indicators to determine whether the at least one current signal strength indicator is less than the at least one previously remembered signal strength indicator by an amount greater than the first threshold; If the difference is greater than a threshold, the antenna tuning circuit increases the signal strength indicator from the at least one current signal strength indicator to produce a larger antenna gain. An RF receiver comprising: an antenna tuning circuit for varying an antenna tuning signal to tune the antenna; and a controller for controlling generation of an applied channel tuning signal to tune the RF tuner to receive a receive channel. 44. the at least one stored current received signal strength indicator is an average of multiple samples of received signal strength indicators taken in the time from the previous sample to the current sample; the at least one previous signal strength indicator is an average of multiple samples of the current received signal strength indicator. 44. The RF receiver of claim 43, which is an average of multiple samples of received signal strength indicators taken in time up to the previously taken sample included in the average of multiple samples within the range. Faith equipment. 45. According to claim 44, the samples within the average are taken as successive samples. RF receiver on board. 46. Changes in the antenna tuning signal cause the signal strength indicator to increase. 44. The RF receiver of claim 43, wherein the RF receiver is generated by incrementally varying an antenna tuning signal generated by an antenna tuning circuit. 47. If the antenna tuning circuit has a signal strength of at least one current stored signal strength indicator 47. The RF receiver of claim 46, wherein the signal strength indicator is incrementally changed by incrementing or decrementing the antenna signal until it increases. 48. The increment or decrement of the antenna tuning signal is determined by comparison of stored signal strength indicators. if the change in the determined signal strength indicator is less than a second threshold, then the change in the signal strength indicator determined by the comparison of the stored signal strength indicators is greater than the second threshold. A signal consisting of large incremental changes in the antenna tuning signal. RF receiver according to claim 47. 52. Changes as a result of variable antenna gain during reception of transmissions in the receive channel multiple channels in at least one frequency band with a received signal strength of In a tunable RF receiver, the receive channel during reception of a transmission on the receive channel. an antenna that is continuously tuneable in response to an antenna tuning signal to vary the antenna gain for a channel; and an antenna that is tuneable to receive a channel in response to an applied channel tuning signal that specifies reception of a receive channel. an RF tuner coupled to the antenna, at least one a tunable RF amplifier with an operating bandwidth that is narrower in frequency than the frequency band of and responds to changes in the RF amplifier tuning signal to maximize the gain of the RF amplifier. an RF tuner that is shiftable to center the operating bandwidth in a designated channel; and an intermediate frequency circuit coupled to the RF amplifier and storage amplifier tuning signal during reception of the transmission in the receive channel. an RF amplifier tuning signal generation circuit that changes the RF amplifier tuning signal from the storage amplifier tuning signal in response to a signal level; an antenna tuning circuit that responds to a received signal strength indicator and a stored antenna tuning signal that is a function of the received channel and produces maximum antenna gain for the received channel. The antenna tuning circuit continuously generates an antenna tuning signal comprising the at least one stored previously received signal strength indicator and the at least one stored current received signal strength indicator. determining whether the strength indicator is less than at least one previously stored signal strength indicator by an amount greater than a threshold, and if the difference is greater than the threshold, the antenna tuning circuit produces a maximum antenna gain; to increase the signal strength indicator from at least one current signal strength indicator. An antenna tuning circuit that changes the antenna tuning signal and a reception channel that changes the antenna tuning signal. control the generation of an applied channel tuning signal to tune the RF tuner to An RF receiver comprising: a controller; 53. An antenna is tuned to a designated channel in an RF receiver tunable to at least one designated channel with a signal strength that varies as a result of variable antenna gain. a tunable antenna responsive to an antenna tuning signal to vary the antenna gain; RF tuner and intermediate frequency signal an intermediate frequency circuit coupled to an RF tuner to generate a signal and a received signal strength indicator proportional to the level of the intermediate frequency signal, and a storage antenna that is a function of the received signal strength indicator and the channel being received. An antenna tuning circuit that responds to a tuning signal. an antenna tuning circuit that generates an antenna tuning signal that produces maximum antenna gain for the receive channel; An RF receiver comprising a controller for controlling generation of a modulation signal. 54. Application of a memorized antenna tuning signal to a tunable antenna increases the maximum antenna gain. A received signal strength indicator that is smaller than the received signal strength indicator generated by the antenna tuning signal in response to an applied channel tuning signal that specifies initial reception of a designated channel. A tuning circuit varies the antenna tuning signal from the stored antenna tuning signal to generate a maximum level of the received signal strength indicator to receive the transmission in the receive channel. 54. The RF receiver of claim 53, wherein the antenna tuning signal that produced the maximum level of the received signal strength indicator is applied to the tunable antenna to produce a larger antenna gain. 55. An antenna tuning circuit varies the antenna tuning signal from a stored antenna tuning signal to generate large levels of the received signal multiple times, and then The received signal is multiplied multiple times to receive the transmission in the receive channel. 55. The RF receiver of claim 54, wherein the antenna tuning signal that produces the maximum level of the signal strength indicator is applied. 56. The antenna tuning circuit tunes the received signal strength standard produced by the intermediate frequency circuit. Incrementally change the storage amplifier tuning signal until the maximum level of Claims: In response to a received signal strength indicator reaching a high level, the antenna tuning signal is set to the antenna tuning signal that generated the high level when receiving a designated channel. RF receiver according to box 53. 57. In generating the antenna tuning signal that produces the maximum gain, the antenna tuning circuit performs a quadratic process that incrementally changes the antenna tuning signal to increase the intermediate frequency frequency. remembers the resulting received signal strength indicator generated by the antenna tuning signal and increases the antenna tuning signal. The received signal strength indicator generated by the intermediate frequency circuit and the The incremental change in the antenna tuning signal is determined by comparing the received signal strength indicators of the Determine whether the received signal strength indicator of the result from the wavenumber circuit has increased and repeat the incremental changes in the antenna tuning signal until the received signal strength indicator reaches a maximum, the result produced by the intermediate frequency circuit and the previous reception. Claims for storing and comparing signal strength indicators 57. The RF receiver according to box 56. 58. an RF receiver receives channels in at least one frequency band, each frequency band including a plurality of channels, and an antenna tuning circuit storing a plurality of antenna tuning signals and designated by the applied channel tuning signal. channel 58. The RF receiver of claim 57, wherein the RF receiver applies a single memory antenna tuning signal to a tunable antenna that is a function of the antenna. 68. An antenna for a designated channel in an RF receiver tunable to at least one designated channel with a signal strength that varies as a result of a variable antenna gain. an antenna that is tunable in response to an antenna tuning signal to vary the antenna gain; and an antenna that is tunable to receive a designated channel in response to an applied channel tuning signal that designates reception of the designated channel. a circuit coupled to the RF tuner to produce a received signal strength indicator proportional to the signal level in the receiver that is proportional to the antenna gain; the received signal strength indicator and the received antenna tuning signal. an antenna tuning circuit responsive to a memory antenna tuning signal that is a function of the channel; a controller for controlling the generation of an applied channel tuning signal to tune the RF tuner to receive a fixed channel.